Control Panel for Twitter

Gives you more control over Twitter and adds missing features and UI improvements

As of 2023-05-06. See the latest version.

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name        Control Panel for Twitter
// @description Gives you more control over Twitter and adds missing features and UI improvements
// @icon        https://raw.githubusercontent.com/insin/control-panel-for-twitter/master/icons/icon32.png
// @namespace   https://github.com/insin/control-panel-for-twitter/
// @match       https://twitter.com/*
// @match       https://mobile.twitter.com/*
// @run-at      document-start
// @version     107
// ==/UserScript==
void function() {

let debug = false

/** @type {boolean} */
let desktop
/** @type {boolean} */
let mobile
let isSafari = navigator.userAgent.includes('Safari/') && !/Chrom(e|ium)\//.test(navigator.userAgent)

/** @type {HTMLHtmlElement} */
let $html
/** @type {HTMLBodyElement} */
let $body
/** @type {string} */
let lang
/** @type {string} */
let dir
/** @type {boolean} */
let ltr

//#region Default config
/**
 * @type {import("./types").Config}
 */
const config = {
  debug: false,
  // Shared
  addAddMutedWordMenuItem: true,
  alwaysUseLatestTweets: true,
  defaultToLatestSearch: false,
  disableHomeTimeline: false,
  disabledHomeTimelineRedirect: 'notifications',
  dontUseChirpFont: false,
  dropdownMenuFontWeight: true,
  fastBlock: true,
  followButtonStyle: 'monochrome',
  hideAnalyticsNav: true,
  hideBookmarkButton: false,
  hideBookmarkMetrics: true,
  hideBookmarksNav: false,
  hideCommunitiesNav: true,
  hideConnectNav: true,
  hideExplorePageContents: true,
  hideFollowingMetrics: true,
  hideForYouTimeline: true,
  hideHelpCenterNav: true,
  hideHomeHeading: true,
  hideKeyboardShortcutsNav: false,
  hideLikeMetrics: true,
  hideListsNav: false,
  hideMetrics: false,
  hideMonetizationNav: true,
  hideMoreTweets: true,
  hideQuoteTweetMetrics: true,
  hideReplyMetrics: true,
  hideRetweetMetrics: true,
  hideShareTweetButton: false,
  hideSeeNewTweets: false,
  hideTotalTweetsMetrics: true,
  hideTweetAnalyticsLinks: false,
  hideTwitterAdsNav: true,
  hideTwitterBlueNav: true,
  hideTwitterCircleNav: false,
  hideTwitterForProfessionalsNav: true,
  hideUnavailableQuoteTweets: true,
  hideVerifiedNotificationsTab: true,
  hideVerifiedOrgsNav: true,
  hideViews: true,
  hideWhoToFollowEtc: true,
  listRetweets: 'ignore',
  mutableQuoteTweets: true,
  mutedQuotes: [],
  quoteTweets: 'ignore',
  reducedInteractionMode: false,
  retweets: 'separate',
  tweakQuoteTweetsPage: true,
  twitterBlueChecks: 'replace',
  uninvertFollowButtons: true,
  // Experiments
  // none currently
  // Desktop only
  fullWidthContent: false,
  fullWidthMedia: true,
  hideAccountSwitcher: true,
  hideExploreNav: true,
  hideMessagesDrawer: true,
  hideSidebarContent: true,
  navBaseFontSize: true,
  showRelevantPeople: false,
  // Mobile only
  hideAppNags: true,
  hideMessagesBottomNavItem: false,
}
//#endregion

//#region Locales
/**
 * @type {{[key: string]: import("./types").Locale}}
 */
const locales = {
  'ar-x-fm': {
    ADD_MUTED_WORD: 'اضافة كلمة مكتومة',
    DISCOVER_MORE: 'اكتشاف المزيد',
    HOME: 'الرئيسيّة',
    MUTE_THIS_CONVERSATION: 'كتم هذه المحادثه',
    QUOTE_TWEET: 'اقتباس التغريدة',
    QUOTE_TWEETS: 'تغريدات اقتباس',
    RETWEETS: 'إعادات التغريد',
    SHARED_TWEETS: 'التغريدات المشتركة',
    TURN_OFF_RETWEETS: 'تعطيل إعادة التغريد',
    TURN_ON_RETWEETS: 'تفعيل إعادة التغريد',
    TWITTER: 'تويتر',
  },
  ar: {
    ADD_MUTED_WORD: 'اضافة كلمة مكتومة',
    DISCOVER_MORE: 'اكتشاف المزيد',
    HOME: 'الرئيسيّة',
    MUTE_THIS_CONVERSATION: 'كتم هذه المحادثه',
    QUOTE_TWEET: 'اقتباس التغريدة',
    QUOTE_TWEETS: 'تغريدات اقتباس',
    RETWEETS: 'إعادات التغريد',
    SHARED_TWEETS: 'التغريدات المشتركة',
    TURN_OFF_RETWEETS: 'تعطيل إعادة التغريد',
    TURN_ON_RETWEETS: 'تفعيل إعادة التغريد',
  },
  bg: {
    ADD_MUTED_WORD: 'Добавяне на заглушена дума',
    DISCOVER_MORE: 'Откриване на още',
    HOME: 'Начало',
    MUTE_THIS_CONVERSATION: 'Заглушаване на разговора',
    QUOTE_TWEET: 'Цитиране на туита',
    QUOTE_TWEETS: 'Туитове с цитат',
    RETWEETS: 'Ретуитове',
    SHARED_TWEETS: 'Споделени туитове',
    TURN_OFF_RETWEETS: 'Изключване на ретуитовете',
    TURN_ON_RETWEETS: 'Включване на ретуитовете',
  },
  bn: {
    ADD_MUTED_WORD: 'নীরব করা শব্দ যোগ করুন',
    DISCOVER_MORE: 'আরও খুঁজুন',
    HOME: 'হোম',
    MUTE_THIS_CONVERSATION: 'এই কথা-বার্তা নীরব করুন',
    QUOTE_TWEET: 'টুইট উদ্ধৃত করুন',
    QUOTE_TWEETS: 'টুইট উদ্ধৃতিগুলো',
    RETWEETS: 'পুনঃটুইটগুলো',
    SHARED_TWEETS: 'ভাগ করা টুইটগুলি',
    TURN_OFF_RETWEETS: 'পুনঃ টুইটগুলি বন্ধ করুন',
    TURN_ON_RETWEETS: 'পুনঃ টুইটগুলি চালু করুন',
    TWITTER: 'টুইটার',
  },
  ca: {
    ADD_MUTED_WORD: 'Afegeix una paraula silenciada',
    DISCOVER_MORE: 'Descobreix-ne més',
    HOME: 'Inici',
    MUTE_THIS_CONVERSATION: 'Silencia la conversa',
    QUOTE_TWEET: 'Cita el tuit',
    QUOTE_TWEETS: 'Tuits amb cita',
    RETWEETS: 'Retuits',
    SHARED_TWEETS: 'Tuits compartits',
    TURN_OFF_RETWEETS: 'Desactiva els retuits',
    TURN_ON_RETWEETS: 'Activa els retuits',
  },
  cs: {
    ADD_MUTED_WORD: 'Přidat slovo na seznam skrytých slov',
    DISCOVER_MORE: 'Objevte víc',
    HOME: 'Hlavní stránka',
    MUTE_THIS_CONVERSATION: 'Skrýt tuto konverzaci',
    QUOTE_TWEET: 'Citovat Tweet',
    QUOTE_TWEETS: 'Tweety s citací',
    RETWEETS: 'Retweety',
    SHARED_TWEETS: 'Sdílené tweety',
    TURN_OFF_RETWEETS: 'Vypnout retweety',
    TURN_ON_RETWEETS: 'Zapnout retweety',
  },
  da: {
    ADD_MUTED_WORD: 'Tilføj skjult ord',
    DISCOVER_MORE: 'Opdag mere',
    HOME: 'Forside',
    MUTE_THIS_CONVERSATION: 'Skjul denne samtale',
    QUOTE_TWEET: 'Citér Tweet',
    QUOTE_TWEETS: 'Citat-Tweets',
    SHARED_TWEETS: 'Delte tweets',
    TURN_OFF_RETWEETS: 'Slå Retweets fra',
    TURN_ON_RETWEETS: 'Slå Retweets til',
  },
  de: {
    ADD_MUTED_WORD: 'Stummgeschaltetes Wort hinzufügen',
    DISCOVER_MORE: 'Mehr entdecken',
    HOME: 'Startseite',
    MUTE_THIS_CONVERSATION: 'Diese Konversation stummschalten',
    QUOTE_TWEET: 'Tweet zitieren',
    QUOTE_TWEETS: 'Zitierte Tweets',
    SHARED_TWEETS: 'Geteilte Tweets',
    TURN_OFF_RETWEETS: 'Retweets ausschalten',
    TURN_ON_RETWEETS: 'Retweets einschalten',
  },
  el: {
    ADD_MUTED_WORD: 'Προσθήκη λέξης σε σίγαση',
    DISCOVER_MORE: 'Ανακαλύψτε περισσότερα',
    HOME: 'Αρχική σελίδα',
    MUTE_THIS_CONVERSATION: 'Σίγαση αυτής της συζήτησης',
    QUOTE_TWEET: 'Παράθεση Tweet',
    QUOTE_TWEETS: 'Tweet με παράθεση',
    RETWEETS: 'Retweet',
    SHARED_TWEETS: 'Κοινόχρηστα Tweets',
    TURN_OFF_RETWEETS: 'Απενεργοποίηση των Retweet',
    TURN_ON_RETWEETS: 'Ενεργοποίηση των Retweet',
  },
  en: {
    ADD_MUTED_WORD: 'Add muted word',
    DISCOVER_MORE: 'Discover more',
    HOME: 'Home',
    MUTE_THIS_CONVERSATION: 'Mute this conversation',
    QUOTE_TWEET: 'Quote Tweet',
    QUOTE_TWEETS: 'Quote Tweets',
    RETWEETS: 'Retweets',
    SHARED_TWEETS: 'Shared Tweets',
    TURN_OFF_RETWEETS: 'Turn off Retweets',
    TURN_ON_RETWEETS: 'Turn on Retweets',
    TWITTER: 'Twitter',
  },
  es: {
    ADD_MUTED_WORD: 'Añadir palabra silenciada',
    DISCOVER_MORE: 'Descubrir más',
    HOME: 'Inicio',
    MUTE_THIS_CONVERSATION: 'Silenciar esta conversación',
    QUOTE_TWEET: 'Citar Tweet',
    QUOTE_TWEETS: 'Tweets citados',
    SHARED_TWEETS: 'Tweets compartidos',
    TURN_OFF_RETWEETS: 'Desactivar Retweets',
    TURN_ON_RETWEETS: 'Activar Retweets',
  },
  eu: {
    ADD_MUTED_WORD: 'Gehitu isilarazitako hitza',
    HOME: 'Hasiera',
    MUTE_THIS_CONVERSATION: 'Isilarazi elkarrizketa hau',
    QUOTE_TWEET: 'Txioa apaitu',
    QUOTE_TWEETS: 'Aipatu txioak',
    RETWEETS: 'Bertxioak',
    SHARED_TWEETS: 'Partekatutako',
    TURN_OFF_RETWEETS: 'Desaktibatu birtxioak',
    TURN_ON_RETWEETS: 'Aktibatu birtxioak',
  },
  fa: {
    ADD_MUTED_WORD: 'افزودن واژه خموش‌سازی شده',
    DISCOVER_MORE: 'کاوش بیشتر',
    HOME: 'خانه',
    MUTE_THIS_CONVERSATION: 'خموش‌سازی این گفتگو',
    QUOTE_TWEET: 'نقل‌توییت',
    QUOTE_TWEETS: 'نقل‌توییت‌ها',
    RETWEETS: 'بازتوییت‌ها',
    SHARED_TWEETS: 'توییتهای مشترک',
    TURN_OFF_RETWEETS: 'غیرفعال‌سازی بازتوییت‌ها',
    TURN_ON_RETWEETS: 'فعال سازی بازتوییت‌ها',
    TWITTER: 'توییتر',
  },
  fi: {
    ADD_MUTED_WORD: 'Lisää hiljennetty sana',
    DISCOVER_MORE: 'Löydä uutta',
    HOME: 'Etusivu',
    MUTE_THIS_CONVERSATION: 'Hiljennä tämä keskustelu',
    QUOTE_TWEET: 'Twiitin lainaus',
    QUOTE_TWEETS: 'Twiitin lainaukset',
    RETWEETS: 'Uudelleentwiittaukset',
    SHARED_TWEETS: 'Jaetut twiitit',
    TURN_OFF_RETWEETS: 'Poista uudelleentwiittaukset käytöstä',
    TURN_ON_RETWEETS: 'Ota uudelleentwiittaukset käyttöön',
  },
  fil: {
    ADD_MUTED_WORD: 'Idagdag ang naka-mute na salita',
    DISCOVER_MORE: 'Tuklasin ang higit pa',
    HOME: 'Home',
    MUTE_THIS_CONVERSATION: 'I-mute ang usapang ito',
    QUOTE_TWEET: 'Quote na Tweet',
    QUOTE_TWEETS: 'Mga Quote na Tweet',
    RETWEETS: 'Mga Retweet',
    SHARED_TWEETS: 'Mga Ibinahaging Tweet',
    TURN_OFF_RETWEETS: 'I-off ang Retweets',
    TURN_ON_RETWEETS: 'I-on ang Retweets',
  },
  fr: {
    ADD_MUTED_WORD: 'Ajouter un mot masqué',
    DISCOVER_MORE: 'Découvrez plus',
    HOME: 'Accueil',
    MUTE_THIS_CONVERSATION: 'Masquer cette conversation',
    QUOTE_TWEET: 'Citer le Tweet',
    QUOTE_TWEETS: 'Tweets cités',
    SHARED_TWEETS: 'Tweets partagés',
    TURN_OFF_RETWEETS: 'Désactiver les Retweets',
    TURN_ON_RETWEETS: 'Activer les Retweets',
  },
  ga: {
    ADD_MUTED_WORD: 'Cuir focal balbhaithe leis',
    HOME: 'Baile',
    MUTE_THIS_CONVERSATION: 'Balbhaigh an comhrá seo',
    QUOTE_TWEET: 'Cuir Ráiteas Leis',
    QUOTE_TWEETS: 'Luaigh Tvuíteanna',
    RETWEETS: 'Atweetanna',
    SHARED_TWEETS: 'Tweetanna Roinnte',
    TURN_OFF_RETWEETS: 'Cas as Atweetanna',
    TURN_ON_RETWEETS: 'Cas Atweetanna air',
  },
  gl: {
    ADD_MUTED_WORD: 'Engadir palabra silenciada',
    HOME: 'Inicio',
    MUTE_THIS_CONVERSATION: 'Silenciar esta conversa',
    QUOTE_TWEET: 'Citar chío',
    QUOTE_TWEETS: 'Chíos citados',
    RETWEETS: 'Rechouchíos',
    SHARED_TWEETS: 'Chíos compartidos',
    TURN_OFF_RETWEETS: 'Desactivar os rechouchíos',
    TURN_ON_RETWEETS: 'Activar os rechouchíos',
  },
  gu: {
    ADD_MUTED_WORD: 'જોડાણ અટકાવેલો શબ્દ ઉમેરો',
    DISCOVER_MORE: 'વધુ શોધો',
    HOME: 'હોમ',
    MUTE_THIS_CONVERSATION: 'આ વાર્તાલાપનું જોડાણ અટકાવો',
    QUOTE_TWEET: 'અવતરણની સાથે ટ્વીટ કરો',
    QUOTE_TWEETS: 'અવતરણની સાથે ટ્વીટ્સ',
    RETWEETS: 'પુનટ્વીટ્સ',
    SHARED_TWEETS: 'શેર કરેલી ટ્વીટ્સ',
    TURN_OFF_RETWEETS: 'પુનટ્વીટ્સ બંધ કરો',
    TURN_ON_RETWEETS: 'પુનટ્વીટ્સ ચાલુ કરો',
  },
  he: {
    ADD_MUTED_WORD: 'הוסף מילה מושתקת',
    DISCOVER_MORE: 'גלה עוד',
    HOME: 'דף הבית',
    MUTE_THIS_CONVERSATION: 'להשתיק את השיחה הזאת',
    QUOTE_TWEET: 'ציטוט ציוץ',
    QUOTE_TWEETS: 'ציוצי ציטוט',
    RETWEETS: 'ציוצים מחדש',
    SHARED_TWEETS: 'ציוצים משותפים',
    TURN_OFF_RETWEETS: 'כבה ציוצים מחדש',
    TURN_ON_RETWEETS: 'הפעל ציוצים מחדש',
    TWITTER: 'טוויטר',
  },
  hi: {
    ADD_MUTED_WORD: 'म्यूट किया गया शब्द जोड़ें',
    DISCOVER_MORE: 'और अधिक जानें',
    HOME: 'होम',
    MUTE_THIS_CONVERSATION: 'इस बातचीत को म्यूट करें',
    QUOTE_TWEET: 'ट्वीट क्वोट करें',
    QUOTE_TWEETS: 'कोट ट्वीट्स',
    RETWEETS: 'रीट्वीट्स',
    SHARED_TWEETS: 'साझा किए गए ट्वीट',
    TURN_OFF_RETWEETS: 'रीट्वीट बंद करें',
    TURN_ON_RETWEETS: 'रीट्वीट चालू करें',
  },
  hr: {
    ADD_MUTED_WORD: 'Dodaj onemogućenu riječ',
    DISCOVER_MORE: 'Otkrijte više',
    HOME: 'Naslovnica',
    MUTE_THIS_CONVERSATION: 'Isključi zvuk ovog razgovora',
    QUOTE_TWEET: 'Citiraj Tweet',
    QUOTE_TWEETS: 'Citirani tweetovi',
    RETWEETS: 'Proslijeđeni tweetovi',
    SHARED_TWEETS: 'Dijeljeni tweetovi',
    TURN_OFF_RETWEETS: 'Isključi proslijeđene tweetove',
    TURN_ON_RETWEETS: 'Uključi proslijeđene tweetove',
  },
  hu: {
    ADD_MUTED_WORD: 'Elnémított szó hozzáadása',
    DISCOVER_MORE: 'Továbbiak felfedezése',
    HOME: 'Kezdőlap',
    MUTE_THIS_CONVERSATION: 'Beszélgetés némítása',
    QUOTE_TWEET: 'Tweet idézése',
    QUOTE_TWEETS: 'Tweet-idézések',
    RETWEETS: 'Retweetek',
    SHARED_TWEETS: 'Megosztott tweetek',
    TURN_OFF_RETWEETS: 'Retweetek kikapcsolása',
    TURN_ON_RETWEETS: 'Retweetek bekapcsolása',
  },
  id: {
    ADD_MUTED_WORD: 'Tambahkan kata kunci yang dibisukan',
    DISCOVER_MORE: 'Temukan lebih banyak',
    HOME: 'Beranda',
    MUTE_THIS_CONVERSATION: 'Bisukan percakapan ini',
    QUOTE_TWEET: 'Kutip Tweet',
    QUOTE_TWEETS: 'Tweet Kutipan',
    RETWEETS: 'Retweet',
    SHARED_TWEETS: 'Tweet yang Dibagikan',
    TURN_OFF_RETWEETS: 'Matikan Retweet',
    TURN_ON_RETWEETS: 'Nyalakan Retweet',
  },
  it: {
    ADD_MUTED_WORD: 'Aggiungi parola o frase silenziata',
    DISCOVER_MORE: 'Continua con la scoperta',
    HOME: 'Home',
    MUTE_THIS_CONVERSATION: 'Silenzia questa conversazione',
    QUOTE_TWEET: 'Cita Tweet',
    QUOTE_TWEETS: 'Tweet di citazione',
    RETWEETS: 'Retweet',
    SHARED_TWEETS: 'Tweet condivisi',
    TURN_OFF_RETWEETS: 'Disattiva Retweet',
    TURN_ON_RETWEETS: 'Attiva Retweet',
  },
  ja: {
    ADD_MUTED_WORD: 'ミュートするキーワードを追加',
    DISCOVER_MORE: 'もっと見つける',
    HOME: 'ホーム',
    MUTE_THIS_CONVERSATION: 'この会話をミュート',
    QUOTE_TWEET: '引用ツイート',
    QUOTE_TWEETS: '引用ツイート',
    RETWEETS: 'リツイート',
    SHARED_TWEETS: '共有ツイート',
    TURN_OFF_RETWEETS: 'リツイートをオフにする',
    TURN_ON_RETWEETS: 'リツイートをオンにする',
  },
  kn: {
    ADD_MUTED_WORD: 'ಸದ್ದಡಗಿಸಿದ ಪದವನ್ನು ಸೇರಿಸಿ',
    DISCOVER_MORE: 'ಇನ್ನಷ್ಟನ್ನು ಕಂಡುಕೊಳ್ಳಿ',
    HOME: 'ಹೋಮ್',
    MUTE_THIS_CONVERSATION: 'ಈ ಸಂವಾದವನ್ನು ಸದ್ದಡಗಿಸಿ',
    QUOTE_TWEET: 'ಟ್ವೀಟ್ ಕೋಟ್ ಮಾಡಿ',
    QUOTE_TWEETS: 'ಕೋಟ್ ಟ್ವೀಟ್‌ಗಳು',
    RETWEETS: 'ಮರುಟ್ವೀಟ್‌ಗಳು',
    SHARED_TWEETS: 'ಹಂಚಿದ ಟ್ವೀಟ್‌ಗಳು',
    TURN_OFF_RETWEETS: 'ಮರುಟ್ವೀಟ್‌ಗಳನ್ನು ಆಫ್ ಮಾಡಿ',
    TURN_ON_RETWEETS: 'ಮರುಟ್ವೀಟ್‌ಗಳನ್ನು ಆನ್ ಮಾಡಿ',
  },
  ko: {
    ADD_MUTED_WORD: '뮤트할 단어 추가하기',
    DISCOVER_MORE: '더 찾아보기',
    HOME: '홈',
    MUTE_THIS_CONVERSATION: '이 대화 뮤트하기',
    QUOTE_TWEET: '트윗 인용하기',
    QUOTE_TWEETS: '트윗 인용하기',
    RETWEETS: '리트윗',
    SHARED_TWEETS: '공유 트윗',
    TURN_OFF_RETWEETS: '리트윗 끄기',
    TURN_ON_RETWEETS: '리트윗 켜기',
    TWITTER: '트위터',
  },
  mr: {
    ADD_MUTED_WORD: 'म्यूट केलेले शब्द सामील करा',
    DISCOVER_MORE: 'अधिक प्रमाणामध्ये शोधा',
    HOME: 'होम',
    MUTE_THIS_CONVERSATION: 'ही चर्चा म्यूट करा',
    QUOTE_TWEET: 'ट्विट वर भाष्य करा',
    QUOTE_TWEETS: 'भाष्य ट्विट्स',
    RETWEETS: 'पुनर्ट्विट्स',
    SHARED_TWEETS: 'सामायिक ट्विट',
    TURN_OFF_RETWEETS: 'पुनर्ट्विट्स बंद करा',
    TURN_ON_RETWEETS: 'पुनर्ट्विट्स चालू करा',
  },
  ms: {
    ADD_MUTED_WORD: 'Tambahkan perkataan yang disenyapkan',
    DISCOVER_MORE: 'Temui lagi',
    HOME: 'Laman Utama',
    MUTE_THIS_CONVERSATION: 'Senyapkan perbualan ini',
    QUOTE_TWEET: 'Petik Tweet',
    QUOTE_TWEETS: 'Tweet Petikan',
    RETWEETS: 'Tweet semula',
    SHARED_TWEETS: 'Tweet Berkongsi',
    TURN_OFF_RETWEETS: 'Matikan Tweet semula',
    TURN_ON_RETWEETS: 'Hidupkan Tweet semula',
  },
  nb: {
    ADD_MUTED_WORD: 'Skjul nytt ord',
    DISCOVER_MORE: 'Oppdag mer',
    HOME: 'Hjem',
    MUTE_THIS_CONVERSATION: 'Skjul denne samtalen',
    QUOTE_TWEET: 'Sitat-Tweet',
    QUOTE_TWEETS: 'Sitat-Tweets',
    SHARED_TWEETS: 'Delte tweets',
    TURN_OFF_RETWEETS: 'Slå av Retweets',
    TURN_ON_RETWEETS: 'Slå på Retweets',
  },
  nl: {
    ADD_MUTED_WORD: 'Genegeerd woord toevoegen',
    DISCOVER_MORE: 'Meer ontdekken',
    HOME: 'Startpagina',
    MUTE_THIS_CONVERSATION: 'Dit gesprek negeren',
    QUOTE_TWEET: 'Citeer Tweet',
    QUOTE_TWEETS: 'Geciteerde Tweets',
    SHARED_TWEETS: 'Gedeelde Tweets',
    TURN_OFF_RETWEETS: 'Retweets uitschakelen',
    TURN_ON_RETWEETS: 'Retweets inschakelen',
  },
  pl: {
    ADD_MUTED_WORD: 'Dodaj wyciszone słowo',
    DISCOVER_MORE: 'Odkryj więcej',
    HOME: 'Główna',
    MUTE_THIS_CONVERSATION: 'Wycisz tę rozmowę',
    QUOTE_TWEET: 'Cytuj Tweeta',
    QUOTE_TWEETS: 'Cytaty z Tweeta',
    RETWEETS: 'Tweety podane dalej',
    SHARED_TWEETS: 'Udostępnione Tweety',
    TURN_OFF_RETWEETS: 'Wyłącz Tweety podane dalej',
    TURN_ON_RETWEETS: 'Włącz Tweety podane dalej',
  },
  pt: {
    ADD_MUTED_WORD: 'Adicionar palavra silenciada',
    DISCOVER_MORE: 'Descubra mais',
    HOME: 'Página Inicial',
    MUTE_THIS_CONVERSATION: 'Silenciar esta conversa',
    QUOTE_TWEET: 'Comentar o Tweet',
    QUOTE_TWEETS: 'Tweets com comentário',
    SHARED_TWEETS: 'Tweets Compartilhados',
    TURN_OFF_RETWEETS: 'Desativar Retweets',
    TURN_ON_RETWEETS: 'Ativar Retweets',
  },
  ro: {
    ADD_MUTED_WORD: 'Adaugă cuvântul ignorat',
    DISCOVER_MORE: 'Descoperă mai mult',
    HOME: 'Pagina principală',
    MUTE_THIS_CONVERSATION: 'Ignoră această conversație',
    QUOTE_TWEET: 'Citează Tweetul',
    QUOTE_TWEETS: 'Tweeturi cu citat',
    RETWEETS: 'Retweeturi',
    SHARED_TWEETS: 'Tweeturi partajate',
    TURN_OFF_RETWEETS: 'Dezactivează Retweeturile',
    TURN_ON_RETWEETS: 'Activează Retweeturile',
  },
  ru: {
    ADD_MUTED_WORD: 'Добавить игнорируемое слово',
    DISCOVER_MORE: 'Узнать больше',
    HOME: 'Главная',
    MUTE_THIS_CONVERSATION: 'Игнорировать эту переписку',
    QUOTE_TWEET: 'Цитировать',
    QUOTE_TWEETS: 'Твиты с цитатами',
    RETWEETS: 'Ретвиты',
    SHARED_TWEETS: 'Общие твиты',
    TURN_OFF_RETWEETS: 'Отключить ретвиты',
    TURN_ON_RETWEETS: 'Включить ретвиты',
    TWITTER: 'Твиттер',
  },
  sk: {
    ADD_MUTED_WORD: 'Pridať stíšené slovo',
    DISCOVER_MORE: 'Objaviť viac',
    HOME: 'Domov',
    MUTE_THIS_CONVERSATION: 'Stíšiť túto konverzáciu',
    QUOTE_TWEET: 'Tweet s citátom',
    QUOTE_TWEETS: 'Tweety s citátom',
    RETWEETS: 'Retweety',
    SHARED_TWEETS: 'Zdieľané Tweety',
    TURN_OFF_RETWEETS: 'Vypnúť retweety',
    TURN_ON_RETWEETS: 'Zapnúť retweety',
  },
  sr: {
    ADD_MUTED_WORD: 'Додај игнорисану реч',
    DISCOVER_MORE: 'Откриј више',
    HOME: 'Почетна',
    MUTE_THIS_CONVERSATION: 'Игнориши овај разговор',
    QUOTE_TWEET: 'твит са цитатом',
    QUOTE_TWEETS: 'твит(ов)а са цитатом',
    RETWEETS: 'Ретвитови',
    SHARED_TWEETS: 'Дељени твитови',
    TURN_OFF_RETWEETS: 'Искључи ретвитове',
    TURN_ON_RETWEETS: 'Укључи ретвитове',
    TWITTER: 'Твитер',
  },
  sv: {
    ADD_MUTED_WORD: 'Lägg till ignorerat ord',
    DISCOVER_MORE: 'Upptäck mer',
    HOME: 'Hem',
    MUTE_THIS_CONVERSATION: 'Ignorera den här konversationen',
    QUOTE_TWEET: 'Citera Tweet',
    QUOTE_TWEETS: 'Citat-tweets',
    SHARED_TWEETS: 'Delade tweetsen',
    TURN_OFF_RETWEETS: 'Stäng av Retweets',
    TURN_ON_RETWEETS: 'Slå på Retweets',
  },
  ta: {
    ADD_MUTED_WORD: 'செயல்மறைத்த வார்த்தையைச் சேர்',
    DISCOVER_MORE: 'மேலும் கண்டறியவும்',
    HOME: 'முகப்பு',
    MUTE_THIS_CONVERSATION: 'இந்த உரையாடலை செயல்மறை',
    QUOTE_TWEET: 'ட்விட்டை மேற்கோள் காட்டு',
    QUOTE_TWEETS: 'மேற்கோள் கீச்சுகள்',
    RETWEETS: 'மறுகீச்சுகள்',
    SHARED_TWEETS: 'பகிரப்பட்ட ட்வீட்டுகள்',
    TURN_OFF_RETWEETS: 'மறுகீச்சுகளை அணை',
    TURN_ON_RETWEETS: 'மறுகீச்சுகளை இயக்கு',
  },
  th: {
    ADD_MUTED_WORD: 'เพิ่มคำที่ซ่อน',
    DISCOVER_MORE: 'ค้นหาเพิ่มเติม',
    HOME: 'หน้าแรก',
    MUTE_THIS_CONVERSATION: 'ซ่อนบทสนทนานี้',
    QUOTE_TWEET: 'อ้างอิงทวีต',
    QUOTE_TWEETS: 'ทวีตและคำพูด',
    RETWEETS: 'รีทวีต',
    SHARED_TWEETS: 'ทวีตที่แชร์',
    TURN_OFF_RETWEETS: 'ปิดรีทวีต',
    TURN_ON_RETWEETS: 'เปิดรีทวีต',
    TWITTER: 'ทวิตเตอร์',
  },
  tr: {
    ADD_MUTED_WORD: 'Sessize alınacak kelime ekle',
    DISCOVER_MORE: 'Daha fazlasını keşfet',
    HOME: 'Anasayfa',
    MUTE_THIS_CONVERSATION: 'Bu sohbeti sessize al',
    QUOTE_TWEET: 'Tweeti Alıntıla',
    QUOTE_TWEETS: 'Alıntı Tweetler',
    RETWEETS: 'Retweetler',
    SHARED_TWEETS: 'Paylaşılan Tweetler',
    TURN_OFF_RETWEETS: 'Retweetleri kapat',
    TURN_ON_RETWEETS: 'Retweetleri aç',
  },
  uk: {
    ADD_MUTED_WORD: 'Додати слово до списку ігнорування',
    DISCOVER_MORE: 'Дізнавайтеся більше',
    HOME: 'Головна',
    MUTE_THIS_CONVERSATION: 'Ігнорувати цю розмову',
    QUOTE_TWEET: 'Цитувати твіт',
    QUOTE_TWEETS: 'Цитовані твіти',
    RETWEETS: 'Ретвіти',
    SHARED_TWEETS: 'Спільні твіти',
    TURN_OFF_RETWEETS: 'Вимкнути ретвіти',
    TURN_ON_RETWEETS: 'Увімкнути ретвіти',
    TWITTER: 'Твіттер',
  },
  ur: {
    ADD_MUTED_WORD: 'میوٹ شدہ لفظ شامل کریں',
    DISCOVER_MORE: 'مزید دریافت کریں',
    HOME: 'ہوم',
    MUTE_THIS_CONVERSATION: 'اس گفتگو کو میوٹ کریں',
    QUOTE_TWEET: 'ٹویٹ کا حوالہ دیں',
    QUOTE_TWEETS: 'ٹویٹ کو نقل کرو',
    RETWEETS: 'ریٹویٹس',
    SHARED_TWEETS: 'مشترکہ ٹویٹس',
    TURN_OFF_RETWEETS: 'ری ٹویٹس غیر فعال کریں',
    TURN_ON_RETWEETS: 'ری ٹویٹس غیر فعال کریں',
    TWITTER: 'ٹوئٹر',
  },
  vi: {
    ADD_MUTED_WORD: 'Thêm từ tắt tiếng',
    DISCOVER_MORE: 'Khám phá thêm',
    HOME: 'Trang chủ',
    MUTE_THIS_CONVERSATION: 'Tắt tiếng cuộc trò chuyện này',
    QUOTE_TWEET: 'Trích dẫn Tweet',
    QUOTE_TWEETS: 'Tweet trích dẫn',
    RETWEETS: 'Các Tweet lại',
    SHARED_TWEETS: 'Tweet được chia sẻ',
    TURN_OFF_RETWEETS: 'Tắt Tweet lại',
    TURN_ON_RETWEETS: 'Bật Tweet lại',
  },
  'zh-Hant': {
    ADD_MUTED_WORD: '加入靜音文字',
    DISCOVER_MORE: '探索更多',
    HOME: '首頁',
    MUTE_THIS_CONVERSATION: '將此對話靜音',
    QUOTE_TWEET: '引用推文',
    QUOTE_TWEETS: '引用的推文',
    RETWEETS: '轉推',
    SHARED_TWEETS: '分享的推文',
    TURN_OFF_RETWEETS: '關閉轉推',
    TURN_ON_RETWEETS: '開啟轉推',
  },
  zh: {
    ADD_MUTED_WORD: '添加要隐藏的字词',
    DISCOVER_MORE: '发现更多',
    HOME: '主页',
    MUTE_THIS_CONVERSATION: '隐藏此对话',
    QUOTE_TWEET: '引用推文',
    QUOTE_TWEETS: '引用推文',
    RETWEETS: '转推',
    SHARED_TWEETS: '分享的推文',
    TURN_OFF_RETWEETS: '关闭转推',
    TURN_ON_RETWEETS: '开启转推',
  },
}

/**
 * @param {import("./types").LocaleKey} code
 * @returns {string}
 */
function getString(code) {
  return (locales[lang] || locales['en'])[code] || locales['en'][code];
}
//#endregion

//#region Config & variables
/** @enum {string} */
const PagePaths = {
  ADD_MUTED_WORD: '/settings/add_muted_keyword',
  BOOKMARKS: '/i/bookmarks',
  COMPOSE_MESSAGE: '/messages/compose',
  COMPOSE_TWEET: '/compose/tweet',
  CONNECT: '/i/connect',
  CUSTOMIZE_YOUR_VIEW: '/i/display',
  HOME: '/home',
  NOTIFICATION_TIMELINE: '/i/timeline',
  PROFILE_SETTINGS: '/settings/profile',
  SEARCH: '/search',
}

/** @enum {string} */
const Selectors = {
  BLOCK_MENU_ITEM: '[data-testid="block"]',
  DESKTOP_TIMELINE_HEADER: 'div[data-testid="primaryColumn"] > div > div:first-of-type',
  DISPLAY_DONE_BUTTON_DESKTOP: '#layers div[role="button"]:not([aria-label])',
  DISPLAY_DONE_BUTTON_MOBILE: 'main div[role="button"]:not([aria-label])',
  DOGE_LOGO_PATH: 'svg pattern + path[fill]',
  MESSAGES_DRAWER: 'div[data-testid="DMDrawer"]',
  MODAL_TIMELINE: '#layers section > h1 + div[aria-label] > div',
  MOBILE_TIMELINE_HEADER_OLD: 'header > div:nth-of-type(2) > div:first-of-type',
  MOBILE_TIMELINE_HEADER_NEW: 'div[data-testid="TopNavBar"]',
  NAV_HOME_LINK: 'a[data-testid="AppTabBar_Home_Link"]',
  PRIMARY_COLUMN: 'div[data-testid="primaryColumn"]',
  PRIMARY_NAV_DESKTOP: 'header nav',
  PRIMARY_NAV_MOBILE: '#layers nav',
  PROMOTED_TWEET_CONTAINER: '[data-testid="placementTracking"]',
  SIDEBAR: 'div[data-testid="sidebarColumn"]',
  SIDEBAR_WRAPPERS: 'div[data-testid="sidebarColumn"] > div > div > div > div > div',
  TIMELINE: 'div[data-testid="primaryColumn"] section > h1 + div[aria-label] > div',
  TIMELINE_HEADING: 'h2[role="heading"]',
  TWEET: '[data-testid="tweet"]',
  VERIFIED_TICK: 'svg[data-testid="icon-verified"]',
}

/** @enum {string} */
const Svgs = {
  BLUE_LOGO_PATH: 'M16.5 3H2v18h15c3.038 0 5.5-2.46 5.5-5.5 0-1.4-.524-2.68-1.385-3.65-.08-.09-.089-.22-.023-.32.574-.87.908-1.91.908-3.03C22 5.46 19.538 3 16.5 3zm-.796 5.99c.457-.05.892-.17 1.296-.35-.302.45-.684.84-1.125 1.15.004.1.006.19.006.29 0 2.94-2.269 6.32-6.421 6.32-1.274 0-2.46-.37-3.459-1 .177.02.357.03.539.03 1.057 0 2.03-.35 2.803-.95-.988-.02-1.821-.66-2.109-1.54.138.03.28.04.425.04.206 0 .405-.03.595-.08-1.033-.2-1.811-1.1-1.811-2.18v-.03c.305.17.652.27 1.023.28-.606-.4-1.004-1.08-1.004-1.85 0-.4.111-.78.305-1.11 1.113 1.34 2.775 2.22 4.652 2.32-.038-.17-.058-.33-.058-.51 0-1.23 1.01-2.22 2.256-2.22.649 0 1.235.27 1.647.7.514-.1.997-.28 1.433-.54-.168.52-.526.96-.992 1.23z',
  HOME: '<g><path d="M12 9c-2.209 0-4 1.791-4 4s1.791 4 4 4 4-1.791 4-4-1.791-4-4-4zm0 6c-1.105 0-2-.895-2-2s.895-2 2-2 2 .895 2 2-.895 2-2 2zm0-13.304L.622 8.807l1.06 1.696L3 9.679V19.5C3 20.881 4.119 22 5.5 22h13c1.381 0 2.5-1.119 2.5-2.5V9.679l1.318.824 1.06-1.696L12 1.696zM19 19.5c0 .276-.224.5-.5.5h-13c-.276 0-.5-.224-.5-.5V8.429l7-4.375 7 4.375V19.5z"></path></g>',
  MUTE: '<g><path d="M18 6.59V1.2L8.71 7H5.5C4.12 7 3 8.12 3 9.5v5C3 15.88 4.12 17 5.5 17h2.09l-2.3 2.29 1.42 1.42 15.5-15.5-1.42-1.42L18 6.59zm-8 8V8.55l6-3.75v3.79l-6 6zM5 9.5c0-.28.22-.5.5-.5H8v6H5.5c-.28 0-.5-.22-.5-.5v-5zm6.5 9.24l1.45-1.45L16 19.2V14l2 .02v8.78l-6.5-4.06z"></path></g>',
  RETWEET: '<g><path d="M4.5 3.88l4.432 4.14-1.364 1.46L5.5 7.55V16c0 1.1.896 2 2 2H13v2H7.5c-2.209 0-4-1.79-4-4V7.55L1.432 9.48.068 8.02 4.5 3.88zM16.5 6H11V4h5.5c2.209 0 4 1.79 4 4v8.45l2.068-1.93 1.364 1.46-4.432 4.14-4.432-4.14 1.364-1.46 2.068 1.93V8c0-1.1-.896-2-2-2z"></path></g>',
  RETWEETS_OFF: '<g><path d="M3.707 21.707l18-18-1.414-1.414-2.088 2.088C17.688 4.137 17.11 4 16.5 4H11v2h5.5c.028 0 .056 0 .084.002l-10.88 10.88c-.131-.266-.204-.565-.204-.882V7.551l2.068 1.93 1.365-1.462L4.5 3.882.068 8.019l1.365 1.462 2.068-1.93V16c0 .871.278 1.677.751 2.334l-1.959 1.959 1.414 1.414zM18.5 9h2v7.449l2.068-1.93 1.365 1.462-4.433 4.137-4.432-4.137 1.365-1.462 2.067 1.93V9zm-8.964 9l-2 2H13v-2H9.536z"></path></g>',
}

const THEME_COLORS = new Set([
  'rgb(29, 155, 240)', // blue
  'rgb(255, 212, 0)',  // yellow
  'rgb(244, 33, 46)',  // pink
  'rgb(120, 86, 255)', // purple
  'rgb(255, 122, 0)',  // orange
  'rgb(0, 186, 124)',  // green
])
// Matches any notification count at the start of the title
const TITLE_NOTIFICATION_RE = /^\(\d+\+?\) /
// The initial URL when you open the Twitter Circle modal is i/circles
const URL_CIRCLE_RE = /^\/i\/circles(?:\/\d+\/members(?:\/suggested)?)?\/?$/
// The Communities nav item takes you to /yourusername/communities
const URL_COMMUNITIES_RE = /^\/[a-zA-Z\d_]{1,20}\/communities\/?$/
const URL_COMMUNITY_RE = /^\/i\/communities\/\d+(?:\/about)?\/?$/
const URL_COMMUNITY_MEMBERS_RE = /^\/i\/communities\/\d+\/(?:members|moderators)\/?$/
const URL_DISCOVER_COMMUNITIES_RE = /^\/i\/communities\/suggested\/?/
const URL_LIST_RE = /\/i\/lists\/\d+\/?$/
const URL_PHOTO_RE = /photo\/\d\/?$/
// Matches URLs which show one of the tabs on a user profile page
const URL_PROFILE_RE = /^\/([a-zA-Z\d_]{1,20})(?:\/(with_replies|media|likes)\/?|\/)?$/
// Matches URLs which show a user's Followers you know / Followers / Following tab
const URL_PROFILE_FOLLOWS_RE = /^\/[a-zA-Z\d_]{1,20}\/(follow(?:ing|ers|ers_you_follow))\/?$/
const URL_TWEET_ID_RE = /\/status\/(\d+)\/?$/

/**
 * The quoted Tweet associated with a caret menu that's just been opened.
 * @type {import("./types").QuotedTweet}
 */
let quotedTweet = null

/** `true` when a 'Block @${user}' menu item was seen in the last popup. */
let blockMenuItemSeen = false

/** Notification count in the title (including trailing space), e.g. `'(1) '`. */
let currentNotificationCount = ''

/** Title of the current page, without the `' / Twitter'` suffix. */
let currentPage = ''

/** Current `location.pathname`. */
let currentPath = ''

/**
 * CSS rule in the React Native stylesheet which defines the Chirp font-family
 * and fallbacks for the whole app.
 * @type {CSSStyleRule}
 */
let fontFamilyRule = null

/** @type {string} */
let fontSize = null

/** Set to `true` when a Home/Following heading or Home nav link is used. */
let homeNavigationIsBeingUsed = false

/** Set to `true` when the Twitter Circle modal is open. */
let isCircleModalOpen = false

/** Set to `true` when the media modal is open on desktop. */
let isDesktopMediaModalOpen = false

/**
 * Cache for the last page title which was used for the main timeline.
 * @type {string}
 */
let lastMainTimelineTitle = null

/**
 * MutationObservers active on the current modal.
 * @type {import("./types").Disconnectable[]}
 */
let modalObservers = []

/**
 * MutationObservers active on the current page, or anything else we want to
 * clean up when the user moves off the current page.
 * @type {import("./types").Disconnectable[]}
 */
let pageObservers = []

/**
 * Title for the fake timeline used to separate out retweets and quote tweets.
 * @type {string}
 */
let separatedTweetsTimelineTitle = null

/**
 * The current "Color" setting, which can be changed in "Customize your view".
 * @type {string}
 */
let themeColor = null

/**
 * `true` when "For you" was the last tab selected on the main timeline.
 */
let wasForYouTabSelected = false

function isOnBookmarksPage() {
  return currentPath == PagePaths.BOOKMARKS
}

function isOnCommunitiesPage() {
  return URL_COMMUNITIES_RE.test(currentPath)
}

function isOnCommunityPage() {
  return URL_COMMUNITY_RE.test(currentPath)
}

function isOnCommunityMembersPage() {
  return URL_COMMUNITY_MEMBERS_RE.test(currentPath)
}

function isOnDiscoverCommunitiesPage() {
  return URL_DISCOVER_COMMUNITIES_RE.test(currentPath)
}

function isOnExplorePage() {
  return currentPath.startsWith('/explore')
}

function isOnFollowListPage() {
  return URL_PROFILE_FOLLOWS_RE.test(currentPath)
}

function isOnHomeTimeline() {
  return currentPage == getString('HOME')
}

function isOnIndividualTweetPage() {
  return URL_TWEET_ID_RE.test(currentPath)
}

function isOnListPage() {
  return URL_LIST_RE.test(currentPath)
}

function isOnMainTimelinePage() {
  return currentPath == PagePaths.HOME || (
    currentPath == PagePaths.CUSTOMIZE_YOUR_VIEW &&
    isOnHomeTimeline() ||
    isOnSeparatedTweetsTimeline()
  )
}

function isOnNotificationsPage() {
  return currentPath.startsWith('/notifications')
}

function isOnProfilePage() {
  let profilePathUsername = currentPath.match(URL_PROFILE_RE)?.[1]
  if (!profilePathUsername) return false
  // twitter.com/user and its sub-URLs put @user in the title
  return currentPage.toLowerCase().includes(`${ltr ? '@' : ''}${profilePathUsername.toLowerCase()}${!ltr ? '@' : ''}`)
}

function isOnQuoteTweetsPage() {
  return currentPath.endsWith('/retweets/with_comments')
}

function isOnSearchPage() {
  return currentPath.startsWith('/search') || currentPath.startsWith('/hashtag/')
}

function isOnSeparatedTweetsTimeline() {
  return currentPage == separatedTweetsTimelineTitle
}

function isOnTopicsPage() {
  return currentPath != '/topics' && Boolean(currentPath.match(/\/topics(\/|$)/))
}

function shouldHideSidebar() {
  return isOnExplorePage() || isOnDiscoverCommunitiesPage()
}
//#endregion

//#region Utility functions
/**
 * @param {string} role
 * @return {HTMLStyleElement}
 */
function addStyle(role) {
  let $style = document.createElement('style')
  $style.dataset.insertedBy = 'control-panel-for-twitter'
  $style.dataset.role = role
  document.head.appendChild($style)
  return $style
}

/**
 * @param {Element} $svg
 */
function blueCheck($svg) {
  if (!$svg) {
    warn('blueCheck was given', $svg)
    return
  }
  $svg.classList.add('tnt_blue_check')
  // Safari doesn't support using `d: path(…)` to replace paths in an SVG, so
  // we have to manually patch the path in it.
  if (isSafari) {
    $svg.firstElementChild.firstElementChild.setAttribute('d', Svgs.BLUE_LOGO_PATH)
  }
}

/**
 * @param {string} str
 * @return {string}
 */
function dedent(str) {
  str = str.replace(/^[ \t]*\r?\n/, '')
  let indent = /^[ \t]+/m.exec(str)
  if (indent) str = str.replace(new RegExp('^' + indent[0], 'gm'), '')
  return str.replace(/(\r?\n)[ \t]+$/, '$1')
}

/**
 * @param {string} name
 * @param {import("./types").Disconnectable[]} observers
 * @param {string?} type
 */
function disconnectObserver(name, observers, type = 'observer') {
  for (let i = observers.length -1; i >= 0; i--) {
    let observer = observers[i]
    if ('name' in observer && observer.name == name) {
      observer.disconnect()
      observers.splice(i, 1)
      log(`disconnected ${name} ${type}`)
    }
  }
}

function disconnectModalObserver(name) {
  disconnectObserver(name, modalObservers)
}

function disconnectAllModalObservers() {
  if (modalObservers.length > 0) {
    log(
      `disconnecting ${modalObservers.length} modal observer${s(modalObservers.length)}`,
      modalObservers.map(observer => observer['name'])
    )
    modalObservers.forEach(observer => observer.disconnect())
    modalObservers = []
  }
}

function disconnectPageObserver(name) {
  disconnectObserver(name, pageObservers, 'page observer')
}

/**
 * @param {string} selector
 * @param {{
 *   name?: string
 *   stopIf?: () => boolean
 *   timeout?: number
 *   context?: Document | HTMLElement
 * }?} options
 * @returns {Promise<HTMLElement | null>}
 */
function getElement(selector, {
  name = null,
  stopIf = null,
  timeout = Infinity,
  context = document,
} = {}) {
  return new Promise((resolve) => {
    let startTime = Date.now()
    let rafId
    let timeoutId

    function stop($element, reason) {
      if ($element == null) {
        warn(`stopped waiting for ${name || selector} after ${reason}`)
      }
      else if (Date.now() > startTime) {
        log(`${name || selector} appeared after ${Date.now() - startTime}ms`)
      }
      if (rafId) {
        cancelAnimationFrame(rafId)
      }
      if (timeoutId) {
        clearTimeout(timeoutId)
      }
      resolve($element)
    }

    if (timeout !== Infinity) {
      timeoutId = setTimeout(stop, timeout, null, `${timeout}ms timeout`)
    }

    function queryElement() {
      let $element = context.querySelector(selector)
      if ($element) {
        stop($element)
      }
      else if (stopIf?.() === true) {
        stop(null, 'stopIf condition met')
      }
      else {
        rafId = requestAnimationFrame(queryElement)
      }
    }

    queryElement()
  })
}

function log(...args) {
  if (debug) {
    console.log(`${currentPage ? `(${
      currentPage.length < 70 ? currentPage : currentPage.slice(0, 70) + '…'
    })` : ''}`, ...args)
  }
}

function warn(...args) {
  if (debug) {
    console.log(`❗ ${currentPage ? `(${currentPage})` : ''}`, ...args)
  }
}

function error(...args) {
  console.log(`❌ ${currentPage ? `(${currentPage})` : ''}`, ...args)
}

/**
 * @param {() => boolean} condition
 * @returns {() => boolean}
 */
 function not(condition) {
  return () => !condition()
}

/**
 * Convenience wrapper for the MutationObserver API - the callback is called
 * immediately to support using an observer and its options as a trigger for any
 * change, without looking at MutationRecords.
 * @param {Node} $element
 * @param {MutationCallback} callback
 * @param {string} name
 * @param {MutationObserverInit} options
 * @return {import("./types").NamedMutationObserver}
 */
function observeElement($element, callback, name = '', options = {childList: true}) {
  if (name) {
    if (options.childList && callback.length > 0) {
      log(`observing ${name}`, $element)
    } else {
      log (`observing ${name}`)
    }
  }

  let observer = new MutationObserver(callback)
  callback([], observer)
  observer.observe($element, options)
  observer['name'] = name
  return observer
}

/**
 * @param {string} page
 * @returns {() => boolean}
 */
function pageIsNot(page) {
  return () => page != currentPage
}

/**
 * @param {string} path
 * @returns {() => boolean}
 */
function pathIsNot(path) {
  return () => path != currentPath
}

/**
 * @param {number} n
 * @returns {string}
 */
function s(n) {
  return n == 1 ? '' : 's'
}

function storeConfigChanges(changes) {
  window.postMessage({type: 'tntConfigChange', changes})
}
//#endregion

//#region Global observers
const checkReactNativeStylesheet = (() => {
  let startTime = Date.now()

  return function checkReactNativeStylesheet() {
    let $style = /** @type {HTMLStyleElement} */ (document.querySelector('style#react-native-stylesheet'))
    if (!$style) {
      warn('React Native stylesheet not found')
      return
    }

    for (let rule of $style.sheet.cssRules) {
      if (!(rule instanceof CSSStyleRule)) continue

      if (fontFamilyRule == null &&
          rule.style.fontFamily &&
          rule.style.fontFamily.includes('TwitterChirp')) {
        fontFamilyRule = rule
        log('found Chirp fontFamily CSS rule in React Native stylesheet')
        configureFont()
      }

      if (themeColor == null &&
          rule.style.backgroundColor &&
          THEME_COLORS.has(rule.style.backgroundColor)) {
        themeColor = rule.style.backgroundColor
        log(`found initial theme color in React Native stylesheet: ${themeColor}`)
        configureThemeCss()
      }
    }

    let elapsedTime = Date.now() - startTime
    if (fontFamilyRule == null || themeColor == null) {
      if (elapsedTime < 3000) {
        setTimeout(checkReactNativeStylesheet, 100)
      } else {
        warn(`stopped checking React Native stylesheet after ${elapsedTime}ms`)
      }
    } else {
      log(`finished checking React Native stylesheet in ${elapsedTime}ms`)
    }
  }
})()

/**
 * When the "Background" setting is changed in "Customize your view", <body>'s
 * backgroundColor is changed and the app is re-rendered, so we need to
 * re-process the current page.
 */
function observeBodyBackgroundColor() {
  let lastBackgroundColor = null

  observeElement($body, () => {
    let backgroundColor = $body.style.backgroundColor
    if (backgroundColor == lastBackgroundColor) return

    $body.classList.toggle('Default', backgroundColor == 'rgb(255, 255, 255)')
    $body.classList.toggle('Dim', backgroundColor == 'rgb(21, 32, 43)')
    $body.classList.toggle('LightsOut', backgroundColor == 'rgb(0, 0, 0)')

    if (lastBackgroundColor != null) {
      log('Background setting changed - re-processing current page')
      observePopups()
      processCurrentPage()
    }
    lastBackgroundColor = backgroundColor
  }, '<body> style attribute for background colour changes', {
    attributes: true,
    attributeFilter: ['style']
  })
}

/**
 * @param {Element} $tabContent
 * @param {import("./types").Disconnectable[]} observers
 * @param {(name: string) => void} disconnect
 */
function observeTwitterCircleTabContent($tabContent, observers, disconnect) {
  disconnect('circle tab content')
  // The Recommended tab replaces its initial user list with a typeahead
  // dropdown when you use the input, and reverts if you clear it.
  observers.push(observeElement($tabContent, () => {
    let $userList = /** @type {HTMLElement} */ ($tabContent.querySelector(':scope > div:last-child:not(:first-child), div[id^="typeaheadDropdown"]'))
    if ($userList) {
      disconnect('user list')
      observers.push(observeElement($userList, () => {
        processBlueChecks($userList)
      }, 'user list'))
    } else {
      warn('could not find circle user list')
    }
  }, 'circle tab content'))
}

async function observeCircleModal() {
  let $viewport = await getElement('div[data-viewportview="true"]', {
    name: 'circle modal viewport',
    stopIf: () => !isCircleModalOpen,
  })

  if ($viewport == null) return

  modalObservers.push(observeElement($viewport, (mutations) => {
    // Ignore loading indicators on initial load of each tab
    if (!mutations.length || mutations.some(mutation => mutation.addedNodes[0]?.querySelector('svg circle'))) {
      return
    }
    // The modal version doesn't have a separate container for tab content, it's
    // a sibling of the tabs.
    observeTwitterCircleTabContent($viewport.lastElementChild, modalObservers, disconnectModalObserver)
  }, 'circle modal viewport'))
}

/**
 * When the "Color" setting is changed in "Customize your view", the app
 * re-renders from a certain point, so we need to re-process the current page.
 */
async function observeColor() {
  let $colorRerenderBoundary = await getElement('#react-root > div > div')

  observeElement($colorRerenderBoundary, async () => {
    if (location.pathname != PagePaths.CUSTOMIZE_YOUR_VIEW) return

    let $doneButton = await getElement(desktop ? Selectors.DISPLAY_DONE_BUTTON_DESKTOP : Selectors.DISPLAY_DONE_BUTTON_MOBILE, {
      name: 'Done button',
      stopIf: not(() => location.pathname == PagePaths.CUSTOMIZE_YOUR_VIEW),
    })
    if (!$doneButton) return

    let color = getComputedStyle($doneButton).backgroundColor
    if (color == themeColor) return

    log('Color setting changed - re-processing current page')
    themeColor = color
    configureThemeCss()
    observePopups()
    processCurrentPage()
  }, 'Color change re-render boundary')
}

/**
 * When the "Font size" setting is changed in "Customize your view" on desktop,
 * `<html>`'s fontSize is changed and the app is re-rendered.
 */
const observeHtmlFontSize = (() => {
  /** @type {MutationObserver} */
  let fontSizeObserver

  return function observeHtmlFontSize() {
    if (fontSizeObserver) {
      fontSizeObserver.disconnect()
      fontSizeObserver = null
    }

    if (mobile) return

    let lastOverflow = ''

    fontSizeObserver = observeElement($html, () => {
      if (!$html.style.fontSize) return

      let hasFontSizeChanged = fontSize != null && $html.style.fontSize != fontSize

      if ($html.style.fontSize != fontSize) {
        fontSize = $html.style.fontSize
        log(`<html> fontSize has changed to ${fontSize}`)
        configureNavFontSizeCss()
      }

      // Ignore overflow changes, which happen when a dialog is shown or hidden
      let hasOverflowChanged = $html.style.overflow != lastOverflow
      lastOverflow = $html.style.overflow
      if (!hasFontSizeChanged && hasOverflowChanged) {
        log('ignoring <html> style overflow change')
        return
      }

      // When you switch between the smallest "Font size" options, <html>'s
      // style is updated but the font size is kept the same - re-process just
      // in case.
      if (hasFontSizeChanged ||
          location.pathname == PagePaths.CUSTOMIZE_YOUR_VIEW && fontSize == '14px') {
        log('<html> style attribute changed, re-processing current page')
        observePopups()
        processCurrentPage()
      }
    }, '<html> style attribute for font size changes', {
      attributes: true,
      attributeFilter: ['style']
    })
  }
})()

async function observeDesktopModalTimeline() {
  // Media modals remember if they were previously collapsed, so we could be
  // waiting for the initial timeline to be either rendered or expanded.
  let $initialTimeline = await getElement(Selectors.MODAL_TIMELINE, {
    name: 'initial modal timeline',
    stopIf: () => !isDesktopMediaModalOpen,
  })

  if ($initialTimeline == null) return

  /**
   * @param {HTMLElement} $timeline
   */
  function observeModalTimelineItems($timeline) {
    disconnectModalObserver('modal timeline')
    modalObservers.push(
      observeElement($timeline, () => onTimelineChange($timeline, 'Desktop Media Modal', {hideHeadings: false}), 'modal timeline')
    )

    // If other media in the modal is clicked, the timeline is replaced.
    disconnectModalObserver('modal timeline parent')
    modalObservers.push(
      observeElement($timeline.parentElement, (mutations) => {
        mutations.forEach((mutation) => {
          mutation.addedNodes.forEach((/** @type {HTMLElement} */ $newTimeline) => {
            log('modal timeline replaced')
            disconnectModalObserver('modal timeline')
            modalObservers.push(
              observeElement($newTimeline, () => onTimelineChange($newTimeline, 'Desktop Media Modal', {hideHeadings: false}), 'modal timeline')
            )
          })
        })
      }, 'modal timeline parent')
    )
  }

  /**
   * @param {HTMLElement} $timeline
   */
  function observeModalTimeline($timeline) {
    // If the inital timeline doesn't have a style attribute it's a placeholder
    if ($timeline.hasAttribute('style')) {
      observeModalTimelineItems($timeline)
    }
    else {
      log('waiting for modal timeline')
      let startTime = Date.now()
      modalObservers.push(
        observeElement($timeline.parentElement, (mutations) => {
          mutations.forEach((mutation) => {
            mutation.addedNodes.forEach((/** @type {HTMLElement} */ $timeline) => {
              disconnectModalObserver('modal timeline parent')
              if (Date.now() > startTime) {
                log(`modal timeline appeared after ${Date.now() - startTime}ms`, $timeline)
              }
              observeModalTimelineItems($timeline)
            })
          })
        }, 'modal timeline parent')
      )
    }
  }

  // The modal timeline can be expanded and collapsed
  let $expandedContainer = $initialTimeline.closest('[aria-expanded="true"]')
  modalObservers.push(
    observeElement($expandedContainer.parentElement, async (mutations) => {
      if (mutations.some(mutation => mutation.removedNodes.length > 0)) {
        log('modal timeline collapsed')
        disconnectModalObserver('modal timeline parent')
        disconnectModalObserver('modal timeline')
      }
      else if (mutations.some(mutation => mutation.addedNodes.length > 0)) {
        log('modal timeline expanded')
        let $timeline = await getElement(Selectors.MODAL_TIMELINE, {
          name: 'expanded modal timeline',
          stopIf: () => !isDesktopMediaModalOpen,
        })
        if ($timeline == null) return
        observeModalTimeline($timeline)
      }
    }, 'collapsible modal timeline container')
  )

  observeModalTimeline($initialTimeline)
}

/**
 * Twitter displays popups in the #layers element. It also reuses open popups
 * in certain cases rather than creating one from scratch, so we also need to
 * deal with nested popups, e.g. if you hover over the caret menu in a Tweet, a
 * popup will be created to display a "More" tootip and clicking to open the
 * menu will create a nested element in the existing popup, whereas clicking the
 * caret quickly without hovering over it will display the menu in new popup.
 * Use of nested popups can also differ between desktop and mobile, so features
 * need to be mindful of that.
 */
const observePopups = (() => {
  /** @type {MutationObserver} */
  let popupObserver
  /** @type {WeakMap<HTMLElement, {disconnect()}>} */
  let nestedObservers = new WeakMap()

  return async function observePopups() {
    if (popupObserver) {
      popupObserver.disconnect()
      popupObserver = null
    }

    let $layers = await getElement('#layers', {
      name: 'layers',
    })

    // There can be only one
    if (popupObserver) {
      popupObserver.disconnect()
    }

    popupObserver = observeElement($layers, (mutations) => {
      mutations.forEach((mutation) => {
        mutation.addedNodes.forEach((/** @type {HTMLElement} */ $el) => {
          let nestedObserver = onPopup($el)
          if (nestedObserver) {
            nestedObservers.set($el, nestedObserver)
          }
        })
        mutation.removedNodes.forEach((/** @type {HTMLElement} */ $el) => {
          if (nestedObservers.has($el)) {
            nestedObservers.get($el).disconnect()
            nestedObservers.delete($el)
          }
        })
      })
    }, 'popup container')
  }
})()

async function observeTitle() {
  let $title = await getElement('title', {name: '<title>'})
  observeElement($title, () => onTitleChange($title.textContent), '<title>')
}
//#endregion

//#region Page observers
/**
 * If a profile is blocked its media box won't appear, add a `Blocked` class to
 * `<body>` to hide sidebar content.
 * @param {string} currentPage
 */
async function observeProfileBlockedStatus(currentPage) {
  let $buttonContainer = await getElement(`[data-testid="userActions"] ~ [data-testid="placementTracking"], a[href="${PagePaths.PROFILE_SETTINGS}"]`, {
    name: 'Follow / Unblock button container or Edit profile button',
    stopIf: pageIsNot(currentPage),
  })
  if ($buttonContainer == null) return

  if ($buttonContainer.hasAttribute('href')) {
    log('on own profile page')
    $body.classList.remove('Blocked')
    return
  }

  pageObservers.push(
    observeElement($buttonContainer, () => {
      let isBlocked = (/** @type {HTMLElement} */ ($buttonContainer.querySelector('[role="button"]'))?.dataset.testid ?? '').endsWith('unblock')
      $body.classList.toggle('Blocked', isBlocked)
    }, 'Follow / Unblock button container')
  )
}

/**
 * If an account has never tweeted any media, add a `NoMedia` class to `<body>`
 * to hide the "You might like" section which will appear where the media box
 * would have been.
 * @param {string} currentPage
 */
async function observeProfileSidebar(currentPage) {
  let $sidebarContent = await getElement(Selectors.SIDEBAR_WRAPPERS, {
    name: 'profile sidebar content container',
    stopIf: pageIsNot(currentPage),
  })
  if ($sidebarContent == null) return

  let sidebarContentObserver = observeElement($sidebarContent, () => {
    $body.classList.toggle('NoMedia', $sidebarContent.childElementCount == 5)
  }, 'profile sidebar content container')
  pageObservers.push(sidebarContentObserver)

  // On initial appearance, the sidebar is injected with static HTML with
  // spinner placeholders, which gets replaced. When this happens we need to
  // observe the new content container instead.
  let $sidebarContentParent = $sidebarContent.parentElement
  pageObservers.push(
    observeElement($sidebarContentParent, (mutations) => {
      let sidebarContentReplaced = mutations.some(mutation => Array.from(mutation.removedNodes).includes($sidebarContent))
      if (sidebarContentReplaced) {
        log('profile sidebar content container replaced, observing new container')
        sidebarContentObserver.disconnect()
        pageObservers.splice(pageObservers.indexOf(sidebarContentObserver), 1)
        $sidebarContent = /** @type {HTMLElement} */ ($sidebarContentParent.firstElementChild)
        pageObservers.push(
          observeElement($sidebarContent, () => {
            $body.classList.toggle('NoMedia', $sidebarContent.childElementCount == 5)
          }, 'sidebar content container')
        )
      }
    }, 'sidebar content container parent')
  )
}

async function observeSidebar() {
  let $primaryColumn = await getElement(Selectors.PRIMARY_COLUMN, {
    name: 'primary column'
  })
  let $sidebarContainer = $primaryColumn.parentElement
  pageObservers.push(
    observeElement($sidebarContainer, () => {
      let $sidebar = $sidebarContainer.querySelector(Selectors.SIDEBAR)
      log(`sidebar ${$sidebar ? 'appeared' : 'disappeared'}`)
      $body.classList.toggle('Sidebar', Boolean($sidebar))
      if ($sidebar && config.twitterBlueChecks != 'ignore' && !isOnSearchPage() && !isOnExplorePage()) {
        observeSearchForm()
      }
    }, 'sidebar container')
  )
}

async function observeSearchForm() {
  let $searchForm = await getElement('form[role="search"]', {
    name: 'search form',
    stopIf: pageIsNot(currentPage),
    // The sidebar on Profile pages can be really slow
    timeout: 2000,
  })
  if (!$searchForm) return
  let $results =  /** @type {HTMLElement} */ ($searchForm.lastElementChild)
  pageObservers.push(
    observeElement($results, () => {
      processBlueChecks($results)
    }, 'search results', {childList: true, subtree: true})
  )
}

/**
 * @param {string} page
 * @param {import("./types").TimelineOptions?} options
 */
async function observeTimeline(page, options = {}) {
  let {
    isTabbed = false,
    onTabChanged = null,
    onTimelineAppeared = null,
    tabbedTimelineContainerSelector = null,
    timelineSelector = Selectors.TIMELINE,
  } = options

  let $timeline = await getElement(timelineSelector, {
    name: 'initial timeline',
    stopIf: pageIsNot(page),
  })

  if ($timeline == null) return

  /**
   * @param {HTMLElement} $timeline
   */
  function observeTimelineItems($timeline) {
    disconnectPageObserver('timeline')
    pageObservers.push(
      observeElement($timeline, () => onTimelineChange($timeline, page, options), 'timeline')
    )
    onTimelineAppeared?.()
    if (isTabbed) {
      // When a tab which has been viewed before is revisited, the timeline is
      // replaced.
      disconnectPageObserver('timeline parent')
      pageObservers.push(
        observeElement($timeline.parentElement, (mutations) => {
          mutations.forEach((mutation) => {
            mutation.addedNodes.forEach((/** @type {HTMLElement} */ $newTimeline) => {
              disconnectPageObserver('timeline')
              log('tab changed')
              onTabChanged?.()
              pageObservers.push(
                observeElement($newTimeline, () => onTimelineChange($newTimeline, page, options), 'timeline')
              )
            })
          })
        }, 'timeline parent')
      )
    }
  }

  // If the inital timeline doesn't have a style attribute it's a placeholder
  if ($timeline.hasAttribute('style')) {
    observeTimelineItems($timeline)
  }
  else {
    log('waiting for timeline')
    let startTime = Date.now()
    pageObservers.push(
      observeElement($timeline.parentElement, (mutations) => {
        mutations.forEach((mutation) => {
          mutation.addedNodes.forEach((/** @type {HTMLElement} */ $timeline) => {
            disconnectPageObserver('timeline parent')
            if (Date.now() > startTime) {
              log(`timeline appeared after ${Date.now() - startTime}ms`, $timeline)
            }
            observeTimelineItems($timeline)
          })
        })
      }, 'timeline parent')
    )
  }

  // On some tabbed timeline pages, the first time a new tab is navigated to,
  // the element containing the timeline is replaced with a loading spinner.
  if (isTabbed && tabbedTimelineContainerSelector) {
    let $tabbedTimelineContainer = document.querySelector(tabbedTimelineContainerSelector)
    if ($tabbedTimelineContainer) {
      let waitingForNewTimeline = false
      pageObservers.push(
        observeElement($tabbedTimelineContainer, async (mutations) => {
          // This is going to fire twice on a new tab, as the spinner is added
          // then replaced with the new timeline element.
          if (!mutations.some(mutation => mutation.addedNodes.length > 0) || waitingForNewTimeline) return

          waitingForNewTimeline = true
          let $newTimeline = await getElement(timelineSelector, {
            name: 'new timeline',
            stopIf: pageIsNot(page),
          })
          waitingForNewTimeline = false
          if (!$newTimeline) return

          log('tab changed')
          onTabChanged?.()
          observeTimelineItems($newTimeline)
        }, 'tabbed timeline container')
      )
    } else {
      warn('tabbed timeline container not found')
    }
  }
}
//#endregion

//#region Tweak functions
/**
 * Add an "Add muted word" menu item after "Settings and privacy" which takes
 * you straight to entering a new muted word (by clicking its way through all
 * the individual screens!).
 * @param {HTMLElement} $circleLink
 */
async function addAddMutedWordMenuItem($circleLink) {
  log('adding "Add muted word" menu item')

  // Wait for the dropdown to appear on desktop
  if (desktop) {
    $circleLink = await getElement('#layers div[data-testid="Dropdown"] a[href$="/i/circles"]', {
      name: 'rendered Twitter Circle menu item',
      timeout: 100,
    })
    if (!$circleLink) return
  }

  let $addMutedWord = /** @type {HTMLElement} */ ($circleLink.parentElement.cloneNode(true))
  $addMutedWord.classList.add('tnt_menu_item')
  $addMutedWord.querySelector('a').href = PagePaths.ADD_MUTED_WORD
  $addMutedWord.querySelector('span').textContent = getString('ADD_MUTED_WORD')
  $addMutedWord.querySelector('svg').innerHTML = Svgs.MUTE
  $addMutedWord.addEventListener('click', (e) => {
    e.preventDefault()
    addMutedWord()
  })
  $circleLink.parentElement.insertAdjacentElement('afterend', $addMutedWord)
}

function addCaretMenuListenerForQuoteTweet($tweet) {
  let $caret = /** @type {HTMLElement} */ ($tweet.querySelector('[data-testid="caret"]'))
  if ($caret && !$caret.dataset.tweakNewTwitterListener) {
    $caret.addEventListener('click', () => {
      quotedTweet = getQuotedTweetDetails($tweet)
    })
    $caret.dataset.tweakNewTwitterListener = 'true'
  }
}

/**
 * Add a "Mute this conversation" menu item to a Quote Tweet's menu.
 * @param {HTMLElement} $blockMenuItem
 */
async function addMuteQuotesMenuItem($blockMenuItem) {
  log('adding "Mute this conversation" menu item')

  // Wait for the menu to render properly on desktop
  if (desktop) {
    $blockMenuItem = await getElement(`:scope > div > div > div > ${Selectors.BLOCK_MENU_ITEM}`, {
      context: $blockMenuItem.parentElement,
      name: 'rendered block menu item',
      timeout: 100,
    })
    if (!$blockMenuItem) return
  }

  let $muteQuotes = /** @type {HTMLElement} */ ($blockMenuItem.previousElementSibling.cloneNode(true))
  $muteQuotes.classList.add('tnt_menu_item')
  $muteQuotes.querySelector('span').textContent = getString('MUTE_THIS_CONVERSATION')
  $muteQuotes.addEventListener('click', (e) => {
    e.preventDefault()
    log('muting quotes of a tweet', quotedTweet)
    config.mutedQuotes = config.mutedQuotes.concat(quotedTweet)
    storeConfigChanges({mutedQuotes: config.mutedQuotes})
    processCurrentPage()
    // Dismiss the menu
    let $menuLayer = /** @type {HTMLElement} */ ($blockMenuItem.closest('[role="group"]')?.firstElementChild?.firstElementChild)
    if (!$menuLayer) {
      log('could not find menu layer to dismiss menu')
    }
    $menuLayer?.click()
  })

  $blockMenuItem.insertAdjacentElement('beforebegin', $muteQuotes)
}

async function addMutedWord() {
  if (!document.querySelector('a[href="/settings')) {
    let $settingsAndSupport = /** @type {HTMLElement} */ (document.querySelector('[data-testid="settingsAndSupport"]'))
    $settingsAndSupport?.click()
  }

  for (let path of [
    '/settings',
    '/settings/privacy_and_safety',
    '/settings/mute_and_block',
    '/settings/muted_keywords',
    '/settings/add_muted_keyword',
  ]) {
    let $link = await getElement(`a[href="${path}"]`, {timeout: 500})
    if (!$link) return
    $link.click()
  }
  let $input = await getElement('input[name="keyword"]')
  setTimeout(() => $input.focus(), 100)
}

/**
 * Add a "Turn on/off Retweets" menu item to a List's menu.
 * @param {HTMLElement} $switchMenuItem
 */
async function addToggleListRetweetsMenuItem($switchMenuItem) {
  log('adding "Turn on/off Retweets" menu item')

  // Wait for the menu to render properly on desktop
  if (desktop) {
    $switchMenuItem = await getElement(':scope > div > div > div > [role="menuitem"]', {
      context: $switchMenuItem.parentElement,
      name: 'rendered switch menu item',
      timeout: 100,
    })
    if (!$switchMenuItem) return
  }

  let $toggleRetweets = /** @type {HTMLElement} */ ($switchMenuItem.cloneNode(true))
  $toggleRetweets.classList.add('tnt_menu_item')
  $toggleRetweets.querySelector('span').textContent = getString(`TURN_${config.listRetweets == 'ignore' ? 'OFF' : 'ON'}_RETWEETS`)
  $toggleRetweets.querySelector('svg').innerHTML = config.listRetweets == 'ignore' ? Svgs.RETWEETS_OFF : Svgs.RETWEET
  $toggleRetweets.querySelector(':scope > div:last-child > div:last-child')?.remove()
  $toggleRetweets.addEventListener('click', (e) => {
    e.preventDefault()
    log('toggling list retweets')
    config.listRetweets = config.listRetweets == 'ignore' ? 'hide' : 'ignore'
    storeConfigChanges({listRetweets: config.listRetweets})
    processCurrentPage()
    // Dismiss the menu
    let $menuLayer = /** @type {HTMLElement} */ ($switchMenuItem.closest('[role="group"]')?.firstElementChild?.firstElementChild)
    if (!$menuLayer) {
      log('could not find menu layer to dismiss menu')
    }
    $menuLayer?.click()
  })

  $switchMenuItem.insertAdjacentElement('beforebegin', $toggleRetweets)
}

/**
 * Redirects away from the home timeline if we're on it and it's been disabled.
 * @returns {boolean} `true` if redirected as a result of this call
 */
function checkforDisabledHomeTimeline() {
  if (config.disableHomeTimeline && location.pathname == '/home') {
    log(`home timeline disabled, redirecting to /${config.disabledHomeTimelineRedirect}`)
    let primaryNavSelector = desktop ? Selectors.PRIMARY_NAV_DESKTOP : Selectors.PRIMARY_NAV_MOBILE
    ;/** @type {HTMLElement} */ (
      document.querySelector(`${primaryNavSelector} a[href="/${config.disabledHomeTimelineRedirect}"]`)
    ).click()
    return true
  }
}

const configureCss = (() => {
  let $style

  return function configureCss() {
    if ($style == null) {
      $style = addStyle('features')
    }
    let cssRules = []
    let hideCssSelectors = []
    let menuRole = `[role="${desktop ? 'menu' : 'dialog'}"]`

    // Hover colours for custom menu items
    cssRules.push(`
      body.Default .tnt_menu_item:hover { background-color: rgb(247, 249, 249) !important; }
      body.Dim .tnt_menu_item:hover { background-color: rgb(30, 39, 50) !important; }
      body.LightsOut .tnt_menu_item:hover { background-color: rgb(22, 24, 28) !important; }
    `)

    if (config.alwaysUseLatestTweets && config.hideForYouTimeline) {
      cssRules.push(`
        body.TabbedTimeline ${mobile ? Selectors.MOBILE_TIMELINE_HEADER_NEW : Selectors.PRIMARY_COLUMN} nav div[role="tablist"] > div:first-child {
          flex: 0;
        }
        body.TabbedTimeline ${mobile ? Selectors.MOBILE_TIMELINE_HEADER_NEW : Selectors.PRIMARY_COLUMN} nav div[role="tablist"] > div:first-child > a {
          display: none;
        }
      `)
    }
    if (config.dropdownMenuFontWeight) {
      cssRules.push(`
        [data-testid="${desktop ? 'Dropdown' : 'sheetDialog'}"] [role="menuitem"] [dir] {
          font-weight: normal;
        }
      `)
    }
    if (config.hideAnalyticsNav) {
      hideCssSelectors.push(`${menuRole} a[href*="analytics.twitter.com"]`)
    }
    if (config.hideBookmarkButton) {
      hideCssSelectors.push(
        // Under individual tweets - only hide the 4th button if there are 5
        '[data-testid="tweet"][tabindex="-1"] [role="group"][id^="id__"] > div:nth-child(4):nth-last-child(2)',
      )
    }
    if (config.hideBookmarksNav) {
      hideCssSelectors.push(`${menuRole} a[href$="/bookmarks"]`)
    }
    if (config.hideCommunitiesNav) {
      hideCssSelectors.push(`${menuRole} a[href$="/communities"]`)
    }
    if (config.hideTwitterCircleNav) {
      hideCssSelectors.push(`${menuRole} a[href$="/i/circles"]`)
    }
    if (config.hideShareTweetButton) {
      hideCssSelectors.push(
        // Under timeline tweets
        `[data-testid="tweet"][tabindex="0"] [role="group"] > div[style]`,
        // Under individual tweets
        '[data-testid="tweet"][tabindex="-1"] [role="group"] > div[style]',
      )
    }
    if (config.hideHelpCenterNav) {
      hideCssSelectors.push(`${menuRole} a[href*="support.twitter.com"]`)
    }
    if (config.hideMetrics) {
      configureHideMetricsCss(cssRules, hideCssSelectors)
    }
    if (config.hideMonetizationNav) {
      hideCssSelectors.push(`${menuRole} a[href$="/settings/monetization"]`)
    }
    if (config.hideTweetAnalyticsLinks) {
      hideCssSelectors.push('[data-testid="analyticsButton"]')
    }
    if (config.hideTwitterAdsNav) {
      hideCssSelectors.push(`${menuRole} a[href*="ads.twitter.com"]`)
    }
    if (config.hideTwitterBlueNav) {
      hideCssSelectors.push(`${menuRole} a[href$="/i/twitter_blue_sign_up"]`)
    }
    if (config.hideVerifiedOrgsNav) {
      hideCssSelectors.push(`${menuRole} a[href$="/i/verified-orgs-signup"]`)
    }
    if (config.hideTwitterForProfessionalsNav) {
      hideCssSelectors.push(`${menuRole} a[href$="/convert_to_professional"]`)
    }
    if (config.hideVerifiedNotificationsTab) {
      hideCssSelectors.push('body.Notifications [data-testid="ScrollSnap-List"] > div:nth-child(2):nth-last-child(2)')
    }
    if (config.hideViews) {
      hideCssSelectors.push(
        // "Views" under individual tweets
        '[data-testid="tweet"][tabindex="-1"] div[dir] + div[aria-hidden="true"]:nth-child(2):nth-last-child(2)',
        '[data-testid="tweet"][tabindex="-1"] div[dir] + div[aria-hidden="true"]:nth-child(2):nth-last-child(2) + div[dir]:last-child'
      )
    }
    if (config.hideWhoToFollowEtc) {
      hideCssSelectors.push(`body.Profile ${Selectors.PRIMARY_COLUMN} aside[role="complementary"]`)
    }
    if (config.reducedInteractionMode) {
      hideCssSelectors.push(
        '[data-testid="tweet"] [role="group"]',
        'body.Tweet a:is([href$="/retweets"], [href$="/likes"])',
        'body.Tweet [data-testid="tweet"] + div > div [role="group"]',
      )
    }
    if (config.tweakQuoteTweetsPage) {
      // Hide the quoted tweet, which is repeated in every quote tweet
      hideCssSelectors.push('body.QuoteTweets [data-testid="tweet"] [aria-labelledby] > div:last-child')
    }
    if (config.twitterBlueChecks == 'hide') {
      hideCssSelectors.push('.tnt_blue_check')
    }
    if (config.twitterBlueChecks == 'replace') {
      cssRules.push(`
        :is(${Selectors.VERIFIED_TICK}, svg[data-testid="verificationBadge"]).tnt_blue_check path {
          d: path("${Svgs.BLUE_LOGO_PATH}");
        }
      `)
    }

    // Hide "Creator Studio" if all its contents are hidden
    if (config.hideAnalyticsNav) {
      hideCssSelectors.push(`${menuRole} div[role="button"][aria-expanded]:nth-of-type(1)`)
    }
    // Hide "Professional Tools" if all its contents are hidden
    if (config.hideTwitterForProfessionalsNav && config.hideTwitterAdsNav && config.hideMonetizationNav) {
      hideCssSelectors.push(`${menuRole} div[role="button"][aria-expanded]:nth-of-type(2)`)
    }

    if (config.retweets == 'separate' || config.quoteTweets == 'separate') {
      cssRules.push(`
        body.Default {
          --active-tab-text: rgb(15, 20, 25);
          --inactive-tab-text: rgb(83, 100, 113);
          --tab-border: rgb(239, 243, 244);
          --tab-hover: rgba(15, 20, 25, 0.1);
        }
        body.Dim {
          --active-tab-text: rgb(247, 249, 249);
          --inactive-tab-text: rgb(139, 152, 165);
          --tab-border: rgb(56, 68, 77);
          --tab-hover: rgba(247, 249, 249, 0.1);
        }
        body.LightsOut {
          --active-tab-text: rgb(247, 249, 249);
          --inactive-tab-text: rgb(113, 118, 123);
          --tab-border: rgb(47, 51, 54);
          --tab-hover: rgba(231, 233, 234, 0.1);
        }

        /* Tabbed timeline */
        body.Desktop #tnt_separated_tweets_tab:hover,
        body.Mobile:not(.SeparatedTweets) #tnt_separated_tweets_tab:hover,
        body.Mobile #tnt_separated_tweets_tab:active {
          background-color: var(--tab-hover);
        }
        body:not(.SeparatedTweets) #tnt_separated_tweets_tab > a > div > div,
        body.TabbedTimeline.SeparatedTweets ${mobile ? Selectors.MOBILE_TIMELINE_HEADER_NEW : Selectors.PRIMARY_COLUMN} nav div[role="tablist"] > div:not(#tnt_separated_tweets_tab) > a > div > div {
          font-weight: normal !important;
          color: var(--inactive-tab-text) !important;
        }
        body.SeparatedTweets #tnt_separated_tweets_tab > a > div > div {
          font-weight: bold;
          color: var(--active-tab-text); !important;
        }
        body:not(.SeparatedTweets) #tnt_separated_tweets_tab > a > div > div > div,
        body.TabbedTimeline.SeparatedTweets ${mobile ? Selectors.MOBILE_TIMELINE_HEADER_NEW : Selectors.PRIMARY_COLUMN} nav div[role="tablist"] > div:not(#tnt_separated_tweets_tab) > a > div > div > div {
          height: 0 !important;
        }
        body.SeparatedTweets #tnt_separated_tweets_tab > a > div > div > div {
          height: 4px !important;
          min-width: 56px;
          width: 100%;
          position: absolute;
          bottom: 0;
          border-radius: 9999px;
        }
      `)
    }

    if (desktop) {
      if (config.hideHomeHeading) {
        hideCssSelectors.push(`body.TabbedTimeline ${Selectors.DESKTOP_TIMELINE_HEADER} > div:first-child > div:first-child`)
      }
      if (config.hideSeeNewTweets) {
        hideCssSelectors.push(`body.MainTimeline ${Selectors.PRIMARY_COLUMN} > div > div:first-child > div[style^="transform"]`)
      }
      if (config.disableHomeTimeline) {
        hideCssSelectors.push(`${Selectors.PRIMARY_NAV_DESKTOP} a[href="/home"]`)
      }
      if (config.fullWidthContent) {
        // Pseudo-selector for pages full-width is enabled on
        let pageSelector = ':is(.Community, .List, .MainTimeline)'
        cssRules.push(`
          /* Use full width when the sidebar is visible */
          body.Sidebar${pageSelector} ${Selectors.PRIMARY_COLUMN},
          body.Sidebar${pageSelector} ${Selectors.PRIMARY_COLUMN} > div:first-child > div:last-child {
            max-width: 990px;
          }
          /* Make the "What's happening" input keep its original width */
          body.MainTimeline ${Selectors.PRIMARY_COLUMN} > div:first-child > div:nth-of-type(3) div[role="progressbar"] + div {
            max-width: 598px;
          }
          /* Use full width when the sidebar is not visible */
          body:not(.Sidebar)${pageSelector} header[role="banner"] {
            flex-grow: 0;
          }
          body:not(.Sidebar)${pageSelector} main[role="main"] > div {
            width: 100%;
          }
          body:not(.Sidebar)${pageSelector} ${Selectors.PRIMARY_COLUMN} {
            max-width: unset;
            width: 100%;
          }
          body:not(.Sidebar)${pageSelector} ${Selectors.PRIMARY_COLUMN} > div:first-child > div:first-child div,
          body:not(.Sidebar)${pageSelector} ${Selectors.PRIMARY_COLUMN} > div:first-child > div:last-child {
            max-width: unset;
          }
        `)
        if (!config.fullWidthMedia) {
          // Make media & cards keep their original width
          cssRules.push(`
            body${pageSelector} ${Selectors.PRIMARY_COLUMN} ${Selectors.TWEET} > div > div > div > div:nth-of-type(2) > div:nth-of-type(2) > div:nth-of-type(2) > div[id][aria-labelledby]:not(:empty) {
              max-width: 504px;
            }
          `)
        }
        // Hide the sidebar when present
        hideCssSelectors.push(`body.Sidebar${pageSelector} ${Selectors.SIDEBAR}`)
      }
      if (config.hideAccountSwitcher) {
        cssRules.push(`
          header[role="banner"] > div > div > div > div:last-child {
            flex-shrink: 1 !important;
            align-items: flex-end !important;
          }
        `)
        hideCssSelectors.push(
          '[data-testid="SideNav_AccountSwitcher_Button"] > div:first-child:not(:only-child)',
          '[data-testid="SideNav_AccountSwitcher_Button"] > div:first-child + div',
        )
      }
      if (config.hideExplorePageContents) {
        hideCssSelectors.push(
          // Tabs
          `body.Explore ${Selectors.DESKTOP_TIMELINE_HEADER} nav`,
          // Content
          `body.Explore ${Selectors.TIMELINE}`,
        )
      }
      if (config.hideConnectNav) {
        hideCssSelectors.push(`${menuRole} a[href$="/i/connect_people"]`)
      }
      if (config.hideKeyboardShortcutsNav) {
        hideCssSelectors.push(`${menuRole} a[href$="/i/keyboard_shortcuts"]`)
      }
      if (config.hideListsNav) {
        hideCssSelectors.push(`${Selectors.PRIMARY_NAV_DESKTOP} a[href$="/lists"]`)
      }
      if (config.hideTwitterBlueNav) {
        hideCssSelectors.push(`${Selectors.PRIMARY_NAV_DESKTOP} a[href$="/i/twitter_blue_sign_up"]`)
      }
      if (config.hideVerifiedOrgsNav) {
        hideCssSelectors.push(`${Selectors.PRIMARY_NAV_DESKTOP} a[href$="/i/verified-orgs-signup"]`)
      }
      if (config.hideSidebarContent) {
        // Only show the first sidebar item by default
        // Re-show subsequent non-algorithmic sections on specific pages
        cssRules.push(`
          ${Selectors.SIDEBAR_WRAPPERS} > div:not(:first-of-type) {
            display: none;
          }
          body.Profile:not(.Blocked, .NoMedia) ${Selectors.SIDEBAR_WRAPPERS} > div:is(:nth-of-type(2), :nth-of-type(3)) {
            display: block;
          }
        `)
        if (config.showRelevantPeople) {
          cssRules.push(`
            body.Tweet ${Selectors.SIDEBAR_WRAPPERS} > div:is(:nth-of-type(2), :nth-of-type(3)) {
              display: block;
            }
          `)
        }
        hideCssSelectors.push(`body.HideSidebar ${Selectors.SIDEBAR}`)
      }
      if (config.hideShareTweetButton) {
        hideCssSelectors.push(
          // In media modal
          `[aria-modal="true"] [role="group"] > div[style]:not([role])`,
        )
      }
      if (config.hideExploreNav) {
        hideCssSelectors.push(`${Selectors.PRIMARY_NAV_DESKTOP} a[href="/explore"]`)
      }
      if (config.hideBookmarksNav) {
        hideCssSelectors.push(`${Selectors.PRIMARY_NAV_DESKTOP} a[href="/i/bookmarks"]`)
      }
      if (config.hideMessagesDrawer) {
        cssRules.push(`${Selectors.MESSAGES_DRAWER} { visibility: hidden; }`)
      }
      if (config.hideViews) {
        hideCssSelectors.push(
          // Under timeline tweets
          // The Buffer extension adds a new button in position 2 - use their added class to avoid
          // hiding the wrong button (#209)
          '[data-testid="tweet"][tabindex="0"] [role="group"]:not(.buffer-inserted) > div:nth-of-type(4)',
          '[data-testid="tweet"][tabindex="0"] [role="group"].buffer-inserted > div:nth-of-type(5)',
        )
      }
      if (config.retweets != 'separate' && config.quoteTweets != 'separate') {
        hideCssSelectors.push('#tnt_separated_tweets_tab')
      }
    }

    if (mobile) {
      if (config.disableHomeTimeline) {
        hideCssSelectors.push(`${Selectors.PRIMARY_NAV_MOBILE} a[href="/home"]`)
      }
      if (config.hideSeeNewTweets) {
        hideCssSelectors.push(`body.MainTimeline ${Selectors.MOBILE_TIMELINE_HEADER_NEW} + div[style^="transform"]`)
      }
      if (config.hideAppNags) {
        cssRules.push(`
          body.Tweet ${Selectors.MOBILE_TIMELINE_HEADER_OLD} div:nth-of-type(3) > div > [role="button"],
          body.Tweet ${Selectors.MOBILE_TIMELINE_HEADER_NEW} div:nth-of-type(3) > div > [role="button"] {
            visibility: hidden;
          }
        `)
      }
      if (config.hideExplorePageContents) {
        // Hide explore page contents so we don't get a brief flash of them
        // before automatically switching the page to search mode.
        hideCssSelectors.push(
          // Tabs
          `body.Explore ${Selectors.MOBILE_TIMELINE_HEADER_OLD} > div:nth-of-type(2)`,
          `body.Explore ${Selectors.MOBILE_TIMELINE_HEADER_NEW} > div > div:nth-of-type(2)`,
          // Content
          `body.Explore ${Selectors.TIMELINE}`,
        )
      }
      if (config.hideListsNav) {
        hideCssSelectors.push(`${menuRole} a[href$="/lists"]`)
      }
      if (config.hideMessagesBottomNavItem) {
        hideCssSelectors.push(`${Selectors.PRIMARY_NAV_MOBILE} a[href="/messages"]`)
      }
      if (config.hideShareTweetButton) {
        hideCssSelectors.push(
          // In media modal
          `body.MobilePhoto [role="group"] > div[style]`,
        )
      }
      if (config.hideViews) {
        hideCssSelectors.push(
          // Under timeline tweets
          // Views only display on mobile at larger widths - only hide the 4th button if there are 5
          '[data-testid="tweet"][tabindex="0"] [role="group"]:not(.buffer-inserted) > div:nth-child(4):nth-last-child(2)',
          '[data-testid="tweet"][tabindex="0"] [role="group"].buffer-inserted > div:nth-child(4):nth-last-child(2)',
        )
      }
    }

    if (hideCssSelectors.length > 0) {
      cssRules.push(`
        ${hideCssSelectors.join(',\n')} {
          display: none !important;
        }
      `)
    }

    $style.textContent = cssRules.map(dedent).join('\n')
  }
})()

function configureFont() {
  if (!fontFamilyRule) {
    warn('no fontFamilyRule found for configureFont to use')
    return
  }

  if (config.dontUseChirpFont) {
    if (fontFamilyRule.style.fontFamily.includes('TwitterChirp')) {
      fontFamilyRule.style.fontFamily = fontFamilyRule.style.fontFamily.replace(/"?TwitterChirp"?, ?/, '')
      log('disabled Chirp font')
    }
  } else if (!fontFamilyRule.style.fontFamily.includes('TwitterChirp')) {
    fontFamilyRule.style.fontFamily = `"TwitterChirp", ${fontFamilyRule.style.fontFamily}`
    log(`enabled Chirp font`)
  }
}

/**
 * @param {string[]} cssRules
 * @param {string[]} hideCssSelectors
 */
function configureHideMetricsCss(cssRules, hideCssSelectors) {
  if (config.hideFollowingMetrics) {
    // User profile hover card and page metrics
    hideCssSelectors.push(
      ':is(#layers, body.Profile) a:is([href$="/following"], [href$="/followers"]) > :first-child'
    )
    // Fix display of whitespace after hidden metrics
    cssRules.push(
      ':is(#layers, body.Profile) a:is([href$="/following"], [href$="/followers"]) { white-space: pre-line; }'
    )
  }

  if (config.hideTotalTweetsMetrics) {
    // Tweet count under username header on profile pages
    hideCssSelectors.push(
      mobile ? `
        body.Profile header > div > div:first-of-type h2 + div[dir],
        body.Profile ${Selectors.MOBILE_TIMELINE_HEADER_NEW} > div > div:first-of-type h2 + div[dir]
      ` : `body.Profile ${Selectors.PRIMARY_COLUMN} > div > div:first-of-type h2 + div[dir]`
    )
  }

  let individualTweetMetricSelectors = [
    config.hideRetweetMetrics    && '[href$="/retweets"]',
    config.hideLikeMetrics       && '[href$="/likes"]',
    config.hideQuoteTweetMetrics && '[href$="/retweets/with_comments"]',
  ].filter(Boolean).join(', ')

  if (individualTweetMetricSelectors) {
    // Individual tweet metrics
    hideCssSelectors.push(
      `body.Tweet a:is(${individualTweetMetricSelectors}) > :first-child`,
      `[aria-modal="true"] [data-testid="tweet"] a:is(${individualTweetMetricSelectors}) > :first-child`
    )
    // Fix display of whitespace after hidden metrics
    cssRules.push(
      `body.Tweet a:is(${individualTweetMetricSelectors}), [aria-modal="true"] [data-testid="tweet"] a:is(${individualTweetMetricSelectors}) { white-space: pre-line; }`
    )
  }

  if (config.hideBookmarkMetrics) {
    // Bookmark metrics are the only one without a link
    hideCssSelectors.push('[data-testid="tweet"][tabindex="-1"] [role="group"]:not([id]) > div > div')
  }

  let timelineMetricSelectors = [
    config.hideReplyMetrics   && '[data-testid="reply"]',
    config.hideRetweetMetrics && '[data-testid$="retweet"]',
    config.hideLikeMetrics    && '[data-testid$="like"]',
  ].filter(Boolean).join(', ')

  if (timelineMetricSelectors) {
    cssRules.push(
      `[role="group"] div:is(${timelineMetricSelectors}) span { visibility: hidden; }`
    )
  }
}

const configureNavFontSizeCss = (() => {
  let $style

  return function configureNavFontSizeCss() {
    if ($style == null) {
      $style = addStyle('nav-font-size')
    }
    let cssRules = []

    if (fontSize != null && config.navBaseFontSize) {
      cssRules.push(`
        ${Selectors.PRIMARY_NAV_DESKTOP} div[dir] span { font-size: ${fontSize}; font-weight: normal; }
        ${Selectors.PRIMARY_NAV_DESKTOP} div[dir] { margin-top: -4px; }
      `)
    }

    $style.textContent = cssRules.map(dedent).join('\n')
  }
})()

/**
 * Configures – or re-configures – the separated tweets timeline title.
 *
 * If we're currently on the separated tweets timeline and…
 * - …its title has changed, the page title will be changed to "navigate" to it.
 * - …the separated tweets timeline is no longer needed, we'll change the page
 *   title to "navigate" back to the main timeline.
 *
 * @returns {boolean} `true` if "navigation" was triggered by this call
 */
function configureSeparatedTweetsTimelineTitle() {
  let wasOnSeparatedTweetsTimeline = isOnSeparatedTweetsTimeline()
  let previousTitle = separatedTweetsTimelineTitle

  if (config.retweets == 'separate' && config.quoteTweets == 'separate') {
    separatedTweetsTimelineTitle = getString('SHARED_TWEETS')
  } else if (config.retweets == 'separate') {
    separatedTweetsTimelineTitle = getString('RETWEETS')
  } else if (config.quoteTweets == 'separate') {
    separatedTweetsTimelineTitle = getString('QUOTE_TWEETS')
  } else {
    separatedTweetsTimelineTitle = null
  }

  let titleChanged = previousTitle != separatedTweetsTimelineTitle
  if (wasOnSeparatedTweetsTimeline) {
    if (separatedTweetsTimelineTitle == null) {
      log('moving from separated tweets timeline to main timeline after config change')
      setTitle(getString('HOME'))
      return true
    }
    if (titleChanged) {
      log('applying new separated tweets timeline title after config change')
      setTitle(separatedTweetsTimelineTitle)
      return true
    }
  } else {
    if (titleChanged && previousTitle != null && lastMainTimelineTitle == previousTitle) {
      log('updating lastMainTimelineTitle with new separated tweets timeline title')
      lastMainTimelineTitle = separatedTweetsTimelineTitle
    }
  }
}

const configureThemeCss = (() => {
  let $style

  return function configureThemeCss() {
    if ($style == null) {
      $style = addStyle('theme')
    }
    let cssRules = []

    if (debug) {
      cssRules.push(`
        [data-item-type]::after {
          position: absolute;
          top: 0;
          ${ltr ? 'right': 'left'}: 50px;
          content: attr(data-item-type);
          font-family: ${fontFamilyRule?.style.fontFamily || '-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial'};
          background-color: rgb(242, 29, 29);
          color: white;
          font-size: 11px;
          font-weight: bold;
          padding: 4px 6px;
          border-bottom-left-radius: 1em;
          border-bottom-right-radius: 1em;
        }
      `)
    }

    // Active tab colour for custom tabs
    if (themeColor != null && (config.retweets == 'separate' || config.quoteTweets == 'separate')) {
      cssRules.push(`
        body.SeparatedTweets #tnt_separated_tweets_tab > a > div > div > div {
          background-color: ${themeColor} !important;
        }
      `)
    }

    if (config.uninvertFollowButtons) {
      // Shared styles for Following and Follow buttons
      cssRules.push(`
        [role="button"][data-testid$="-unfollow"]:not(:hover) {
          border-color: rgba(0, 0, 0, 0) !important;
        }
        [role="button"][data-testid$="-follow"] {
          background-color: rgba(0, 0, 0, 0) !important;
        }
      `)
      if (config.followButtonStyle == 'monochrome' || themeColor == null) {
        cssRules.push(`
          /* Following button */
          body.Default [role="button"][data-testid$="-unfollow"]:not(:hover) {
            background-color: rgb(15, 20, 25) !important;
          }
          body.Default [role="button"][data-testid$="-unfollow"]:not(:hover) > * {
            color: rgb(255, 255, 255) !important;
          }
          body:is(.Dim, .LightsOut) [role="button"][data-testid$="-unfollow"]:not(:hover) {
            background-color: rgb(255, 255, 255) !important;
          }
          body:is(.Dim, .LightsOut) [role="button"][data-testid$="-unfollow"]:not(:hover) > * {
            color: rgb(15, 20, 25) !important;
          }
          /* Follow button */
          body.Default [role="button"][data-testid$="-follow"] {
            border-color: rgb(207, 217, 222) !important;
          }
          body:is(.Dim, .LightsOut) [role="button"][data-testid$="-follow"] {
            border-color: rgb(83, 100, 113) !important;
          }
          body.Default [role="button"][data-testid$="-follow"] > * {
            color: rgb(15, 20, 25) !important;
          }
          body:is(.Dim, .LightsOut) [role="button"][data-testid$="-follow"] > * {
            color: rgb(255, 255, 255) !important;
          }
          body.Default [role="button"][data-testid$="-follow"]:hover {
            background-color: rgba(15, 20, 25, 0.1) !important;
          }
          body:is(.Dim, .LightsOut) [role="button"][data-testid$="-follow"]:hover {
            background-color: rgba(255, 255, 255, 0.1) !important;
          }
        `)
      }
      if (config.followButtonStyle == 'themed' && themeColor != null) {
        cssRules.push(`
          /* Following button */
          [role="button"][data-testid$="-unfollow"]:not(:hover) {
            background-color: ${themeColor} !important;
          }
          [role="button"][data-testid$="-unfollow"]:not(:hover) > * {
              color: rgb(255, 255, 255) !important;
          }
          /* Follow button */
          [role="button"][data-testid$="-follow"] {
            border-color: ${themeColor} !important;
          }
          [role="button"][data-testid$="-follow"] > * {
            color: ${themeColor} !important;
          }
          [role="button"][data-testid$="-follow"]:hover {
            background-color: ${themeColor} !important;
          }
          [role="button"][data-testid$="-follow"]:hover > * {
            color: rgb(255, 255, 255) !important;
          }
        `)
      }
    }

    $style.textContent = cssRules.map(dedent).join('\n')
  }
})()

/**
 * @param {HTMLElement} $tweet
 * @returns {import("./types").QuotedTweet}
 */
 function getQuotedTweetDetails($tweet) {
  let $quotedTweet = $tweet.querySelector('div[id^="id__"] > div[dir] > span').parentElement.nextElementSibling
  let $heading = $quotedTweet?.querySelector(':scope > div > div:first-child')
  let user = $heading?.querySelector('div:last-child > span')?.textContent
  let time = $heading?.querySelector('time')?.dateTime
  let $qtText = $heading?.nextElementSibling?.querySelector('[lang]')
  let text = $qtText && Array.from($qtText.childNodes, node => {
    if (node.nodeType == 1) {
      if (node.nodeName == 'IMG') return node.alt
      return node.textContent
    }
    return node.nodeValue
  }).join('')
  return {user, time, text}
}

/**
 * Attempts to determine the type of a timeline Tweet given the element with
 * data-testid="tweet" on it, falling back to TWEET if it doesn't appear to be
 * one of the particular types we care about.
 * @param {HTMLElement} $tweet
 * @returns {import("./types").TimelineItemType}
 */
function getTweetType($tweet) {
  if ($tweet.closest(Selectors.PROMOTED_TWEET_CONTAINER)) {
    return 'PROMOTED_TWEET'
  }
  // Assume social context tweets are Retweets
  if ($tweet.querySelector('[data-testid="socialContext"]')) {
    // Quoted tweets from accounts you blocked or muted are displayed as an
    // <article> with "This Tweet is unavailable."
    if ($tweet.querySelector('article')) {
      return 'UNAVAILABLE_RETWEET'
    }
    // Quoted tweets are preceded by visually-hidden "Quote Tweet" text
    if ($tweet.querySelector('div[id^="id__"] > div[dir] > span')?.textContent.includes(getString('QUOTE_TWEET'))) {
      return 'RETWEETED_QUOTE_TWEET'
    }
    return 'RETWEET'
  }
  // Quoted tweets are preceded by visually-hidden "Quote Tweet" text
  if ($tweet.querySelector('div[id^="id__"] > div[dir] > span')?.textContent.includes(getString('QUOTE_TWEET'))) {
    return 'QUOTE_TWEET'
  }
  // Quoted tweets from accounts you blocked or muted are displayed as an
  // <article> with "This Tweet is unavailable."
  if ($tweet.querySelector('article')) {
    return 'UNAVAILABLE_QUOTE_TWEET'
  }
  return 'TWEET'
}

// Add 1 every time this gets broken: 6
function getVerifiedProps($svg) {
  let propsGetter = (props) => props?.children?.props?.children?.[0]?.[0]?.props
  let $parent = $svg.parentElement.parentElement
  // Verified badge button on the profile screen
  if (isOnProfilePage() && $svg.parentElement.getAttribute('role') == 'button') {
    $parent = $svg.closest('span').parentElement
  }
  // Link variant in "user followed/liked/retweeted" notifications
  else if (isOnNotificationsPage() && $parent.getAttribute('role') == 'link') {
    propsGetter = (props) => {
      let linkChildren = props?.children?.props?.children?.[0]
      return linkChildren?.[linkChildren.length - 1]?.props
    }
  }
  if ($parent.wrappedJSObject) {
    $parent = $parent.wrappedJSObject
  }
  let reactPropsKey = Object.keys($parent).find(key => key.startsWith('__reactProps$'))
  let props = propsGetter($parent[reactPropsKey])
  if (!props) {
    warn('React props not found for', $svg)
  }
  else if (!('isVerified' in props)) {
    warn('isVerified not in React props for', $svg, {props})
  }
  return props
}

/**
 * @param {HTMLElement} $popup
 * @returns {{tookAction: boolean, onPopupClosed?: () => void}}
 */
function handlePopup($popup) {
  let result = {tookAction: false, onPopupClosed: null}

  if (desktop && !isDesktopMediaModalOpen && URL_PHOTO_RE.test(location.pathname) && currentPath != location.pathname) {
    log('media modal opened')
    isDesktopMediaModalOpen = true
    observeDesktopModalTimeline()
    return {
      tookAction: true,
      onPopupClosed() {
        log('media modal closed')
        isDesktopMediaModalOpen = false
        disconnectAllModalObservers()
      }
    }
  }

  if (desktop && !isCircleModalOpen && URL_CIRCLE_RE.test(location.pathname) && currentPath != location.pathname) {
    log('circle modal opened')
    isCircleModalOpen = true
    observeCircleModal()
    return {
      tookAction: true,
      onPopupClosed() {
        log('circle modal closed')
        isCircleModalOpen = false
        disconnectAllModalObservers()
      }
    }
  }

  if (isOnListPage()) {
    let $switchSvg = $popup.querySelector(`svg path[d^="M12 3.75c-4.56 0-8.25 3.69-8.25 8.25s"]`)
    if ($switchSvg) {
      addToggleListRetweetsMenuItem($popup.querySelector(`[role="menuitem"]`))
      return {tookAction: true}
    }
  }

  if (config.mutableQuoteTweets) {
    if (quotedTweet) {
      let $blockMenuItem = /** @type {HTMLElement} */ ($popup.querySelector(Selectors.BLOCK_MENU_ITEM))
      if ($blockMenuItem) {
        addMuteQuotesMenuItem($blockMenuItem)
        result.tookAction = true
        // Clear the quoted tweet when the popup closes
        result.onPopupClosed = () => {
          quotedTweet = null
        }
      } else {
        quotedTweet = null
      }
    }
  }

  if (config.fastBlock) {
    if (blockMenuItemSeen && $popup.querySelector('[data-testid="confirmationSheetConfirm"]')) {
      log('fast blocking')
      ;/** @type {HTMLElement} */ ($popup.querySelector('[data-testid="confirmationSheetConfirm"]')).click()
      result.tookAction = true
    }
    else if ($popup.querySelector(Selectors.BLOCK_MENU_ITEM)) {
      log('preparing for fast blocking')
      blockMenuItemSeen = true
      // Create a nested observer for mobile, as it reuses the popup element
      result.tookAction = !mobile
    } else {
      blockMenuItemSeen = false
    }
  }

  if (config.addAddMutedWordMenuItem) {
    let $circleLink = /** @type {HTMLElement} */ ($popup.querySelector('a[href$="/i/circles"]'))
    if ($circleLink) {
      addAddMutedWordMenuItem($circleLink)
      result.tookAction = true
    }
  }

  if (config.twitterBlueChecks != 'ignore') {
    // User typeahead dropdown
    let $typeaheadDropdown = /** @type {HTMLElement} */ ($popup.querySelector('div[id^="typeaheadDropdown"]'))
    if ($typeaheadDropdown) {
      log('typeahead dropdown appeared')
      let observer = observeElement($typeaheadDropdown, () => {
        processBlueChecks($typeaheadDropdown)
      }, 'popup typeahead dropdown')
      return {
        tookAction: true,
        onPopupClosed() {
          log('typeahead dropdown closed')
          observer.disconnect()
        }
      }
    }

    // User hovercard popup
    let $hoverCard = /** @type {HTMLElement} */ ($popup.querySelector('[data-testid="HoverCard"]'))
    if ($hoverCard) {
      result.tookAction = true
      getElement('div[data-testid^="UserAvatar-Container"]', {
        context: $hoverCard,
        name: 'user hovercard contents',
        timeout: 500,
      }).then(($contents) => {
        if ($contents) processBlueChecks($popup)
      })
    }
  }

  // Verified account popup when you press the check button on a profile page
  if (config.twitterBlueChecks == 'replace' && isOnProfilePage()) {
    if (mobile) {
      let $verificationBadge = /** @type {HTMLElement} */ ($popup.querySelector('[data-testid="sheetDialog"] [data-testid="verificationBadge"]'))
      if ($verificationBadge) {
        result.tookAction = true
        let $headerBlueCheck = document.querySelector(`body.Profile ${Selectors.MOBILE_TIMELINE_HEADER_NEW} .tnt_blue_check`)
        if ($headerBlueCheck) {
          blueCheck($verificationBadge)
        }
      }
    } else {
      let $hoverCard = /** @type {HTMLElement} */ ($popup.querySelector('[data-testid="HoverCard"]'))
      if ($hoverCard) {
        result.tookAction = true
        getElement(':scope > div > div > div > svg[data-testid="verificationBadge"]', {
          context: $hoverCard,
          name: 'verified account hovercard verification badge',
          timeout: 500,
        }).then(($verificationBadge) => {
          if (!$verificationBadge) return

          let $headerBlueCheck = document.querySelector(`body.Profile ${Selectors.PRIMARY_COLUMN} > div > div:first-of-type h2 .tnt_blue_check`)
          if (!$headerBlueCheck) return

          // Wait for the hovercard to render its contents
          let popupRenderObserver = observeElement($popup, (mutations) => {
            if (!mutations.length) return
            blueCheck($popup.querySelector('svg[data-testid="verificationBadge"]'))
            popupRenderObserver.disconnect()
          }, 'verified popup render', {childList: true, subtree: true})
        })
      }
    }
  }

  return result
}

function isBlueVerified($svg) {
  let props = getVerifiedProps($svg)
  return Boolean(props && props.isBlueVerified && !(props.verifiedType || props.affiliateBadgeInfo))
}

/**
 * Checks if a tweet is preceded by an element creating a vertical reply line.
 * @param {HTMLElement} $tweet
 * @returns {boolean}
 */
function isReplyToPreviousTweet($tweet) {
  let $replyLine = $tweet.firstElementChild?.firstElementChild?.firstElementChild?.firstElementChild?.firstElementChild?.firstElementChild
  if ($replyLine) {
    return getComputedStyle($replyLine).width == '2px'
  }
}

/**
 * @returns {{disconnect()}}
 */
function onPopup($popup) {
  log('popup appeared', $popup)

  // If handlePopup did something, we don't need to observe nested popups
  let {tookAction, onPopupClosed} = handlePopup($popup)
  if (tookAction) {
    return onPopupClosed ? {disconnect: onPopupClosed} : null
  }

  /** @type {HTMLElement} */
  let $nestedPopup

  let nestedObserver = observeElement($popup, (mutations) => {
    mutations.forEach((mutation) => {
      mutation.addedNodes.forEach((/** @type {HTMLElement} */ $el) => {
        log('nested popup appeared', $el)
        $nestedPopup = $el
        ;({onPopupClosed} = handlePopup($el))
      })
      mutation.removedNodes.forEach((/** @type {HTMLElement} */ $el) => {
        if ($el !== $nestedPopup) return
        if (onPopupClosed) {
          log('cleaning up after nested popup removed')
          onPopupClosed()
        }
      })
    })
  })

  let disconnect = nestedObserver.disconnect.bind(nestedObserver)
  nestedObserver.disconnect = () => {
    if (onPopupClosed) {
      log('cleaning up after nested popup observer disconnected')
      onPopupClosed()
    }
    disconnect()
  }

  return nestedObserver
}

/**
 * @param {HTMLElement} $timeline
 * @param {string} page
 * @param {import("./types").TimelineOptions?} options
 */
function onTimelineChange($timeline, page, options = {}) {
  let startTime = Date.now()
  let {classifyTweets = true, hideHeadings = true} = options

  let isOnMainTimeline = isOnMainTimelinePage()
  let isOnListTimeline = isOnListPage()

  if (config.twitterBlueChecks != 'ignore' && !isOnMainTimeline && !isOnListTimeline) {
    processBlueChecks($timeline)
  }

  if (!classifyTweets) return

  let itemTypes = {}
  let hiddenItemCount = 0
  let hiddenItemTypes = {}

  /** @type {HTMLElement} */
  let $previousItem = null
  /** @type {?import("./types").TimelineItemType} */
  let previousItemType = null
  /** @type {?boolean} */
  let hidPreviousItem = null
  let hideAllSubsequentItems = false

  for (let $item of $timeline.children) {
    /** @type {?import("./types").TimelineItemType} */
    let itemType = null
    /** @type {?boolean} */
    let hideItem = null
    /** @type {?HTMLElement} */
    let $tweet = $item.querySelector(Selectors.TWEET)

    if (hideAllSubsequentItems) {
      hideItem = true
      itemType = previousItemType
    }
    else if ($tweet != null) {
      itemType = getTweetType($tweet)
      if (isOnMainTimeline || isOnListTimeline) {
        let isReply = isReplyToPreviousTweet($tweet)
        if (isReply && hidPreviousItem != null) {
          hideItem = hidPreviousItem
        } else {
          if (isOnMainTimeline) {
            hideItem = shouldHideMainTimelineItem(itemType, page)
          }
          else if (isOnListTimeline) {
            hideItem = shouldHideListTimelineItem(itemType)
          }
        }

        if (!hideItem && config.mutableQuoteTweets && (itemType == 'QUOTE_TWEET' || itemType == 'RETWEETED_QUOTE_TWEET')) {
          if (config.mutedQuotes.length > 0) {
            let quotedTweet = getQuotedTweetDetails($tweet)
            hideItem = config.mutedQuotes.some(muted => muted.user == quotedTweet.user && muted.time == quotedTweet.time)
          }
          if (!hideItem) {
            addCaretMenuListenerForQuoteTweet($tweet)
          }
        }

        let tweetCheckType
        if (config.twitterBlueChecks != 'ignore') {
          for (let $svg of $tweet.querySelectorAll(Selectors.VERIFIED_TICK)) {
            let isBlueCheck = isBlueVerified($svg)
            if (!isBlueCheck) continue

            blueCheck($svg)

            let userProfileLink = $svg.closest('a[role="link"]:not([href^="/i/status"])')
            if (userProfileLink) {
              tweetCheckType = 'BLUE'
            }
          }
        }

        if (debug) {
          $item.firstElementChild.dataset.itemType = `${itemType}${isReply ? ' / REPLY' : ''}${tweetCheckType ? ` / ${tweetCheckType}` : ''}`
        }
      }
    }
    else if (!isOnMainTimeline && !isOnListTimeline) {
      if ($item.querySelector(':scope > div > div > div > article')) {
        itemType = 'UNAVAILABLE'
      }
    }

    if (!isOnMainTimeline && !isOnListTimeline) {
      if (itemType != null) {
        hideItem = shouldHideOtherTimelineItem(itemType)
        if (debug) {
          $item.firstElementChild.dataset.itemType = itemType
        }
      }
    }

    if (itemType == null) {
      if ($item.querySelector(Selectors.TIMELINE_HEADING)) {
        itemType = 'HEADING'
        // "Discover more" heading and subsequent algorithmic tweets
        if (isOnIndividualTweetPage()) {
          if ($item.querySelector('[dir]')?.innerText == getString('DISCOVER_MORE')) {
            itemType = 'DISCOVER_MORE_HEADING'
            hideItem = config.hideMoreTweets
            hideAllSubsequentItems = config.hideMoreTweets
          }
        }
        // "Who to follow", "Follow some Topics" etc. headings
        else if (hideHeadings) {
          hideItem = config.hideWhoToFollowEtc
        }
        if (debug) {
          $item.firstElementChild.dataset.itemType = itemType
        }
      }
    }

    itemTypes[itemType] ||= 0
    itemTypes[itemType]++

    if (itemType == null) {
      // Assume a non-identified item following an identified item is related.
      // "Who to follow" users and "Follow some Topics" topics appear in
      // subsequent items, as do "Show this thread" and "Show more" links.
      if (previousItemType != null) {
        hideItem = hidPreviousItem
        itemType = previousItemType
      }
    } else if (hideItem) {
      hiddenItemCount++
      hiddenItemTypes[itemType] ||= 0
      hiddenItemTypes[itemType]++
    }

    if (hideItem != null && $item.firstElementChild) {
      if (/** @type {HTMLElement} */ ($item.firstElementChild).style.display != (hideItem ? 'none' : '')) {
        /** @type {HTMLElement} */ ($item.firstElementChild).style.display = hideItem ? 'none' : ''
        // Log these out as they can't be reliably triggered for testing
        if (hideItem && itemType == 'HEADING' || previousItemType == 'HEADING') {
          log(`hid a ${previousItemType == 'HEADING' ? 'post-' : ''}heading item`, $item)
        }
      }
    }

    $previousItem = $item
    hidPreviousItem = hideItem
    // If we hid a heading, keep hiding everything after it until we hit a tweet
    if (!(previousItemType == 'HEADING' && itemType == null)) {
      previousItemType = itemType
    }
  }

  log(`processed ${$timeline.children.length} timeline item${s($timeline.children.length)} in ${Date.now() - startTime}ms`, itemTypes, `hid ${hiddenItemCount}`, hiddenItemTypes)
}

function onTitleChange(title) {
  log('title changed', {title: title.split(ltr ? ' / ' : ' \\ ')[ltr ? 0 : 1], path: location.pathname})

  if (checkforDisabledHomeTimeline()) return

  // Ignore leading notification counts in titles, e.g. '(1) Following'
  let notificationCount = ''
  if (TITLE_NOTIFICATION_RE.test(title)) {
    notificationCount = TITLE_NOTIFICATION_RE.exec(title)[0]
    title = title.replace(TITLE_NOTIFICATION_RE, '')
  }

  let homeNavigationWasUsed = homeNavigationIsBeingUsed
  homeNavigationIsBeingUsed = false

  if (title == getString('TWITTER')) {
    // Mobile uses "Twitter" when viewing a photo - we need to let these process
    // so the next page will be re-processed when the photo is closed.
    if (mobile && URL_PHOTO_RE.test(location.pathname)) {
      log('viewing a photo on mobile')
		}
    // Ignore Flash of Uninitialised Title when navigating to a page for the
    // first time.
    else {
      log('ignoring Flash of Uninitialised Title')
      return
    }
  }

  let newPage = title.split(ltr ? ' / ' : ' \\ ')[ltr ? 0 : 1]

  // Only allow the same page to re-process after a title change on desktop if
  // the "Customize your view" dialog is currently open.
  if (newPage == currentPage && !(desktop && location.pathname == PagePaths.CUSTOMIZE_YOUR_VIEW)) {
    log('ignoring duplicate title change')
    currentNotificationCount = notificationCount
    return
  }

  // Search terms are shown in the title
  if (currentPath == PagePaths.SEARCH && location.pathname == PagePaths.SEARCH) {
    log('ignoring title change on Search page')
    currentNotificationCount = notificationCount
    return
  }

  // On desktop, stay on the separated tweets timeline when…
  if (desktop && currentPage == separatedTweetsTimelineTitle &&
      // …the title has changed back to the main timeline…
      (newPage == getString('HOME')) &&
      // …the Home nav link or Following / Home header _wasn't_ clicked and…
      !homeNavigationWasUsed &&
      (
        // …the user viewed a photo.
        URL_PHOTO_RE.test(location.pathname) ||
        // …the user stopped viewing a photo.
        URL_PHOTO_RE.test(currentPath) ||
        // …the user opened or used the "Customize your view" dialog.
        location.pathname == PagePaths.CUSTOMIZE_YOUR_VIEW ||
        // …the user closed the "Customize your view" dialog.
        currentPath == PagePaths.CUSTOMIZE_YOUR_VIEW ||
        // …the user opened the "Send via Direct Message" dialog.
        location.pathname == PagePaths.COMPOSE_MESSAGE ||
        // …the user closed the "Send via Direct Message" dialog.
        currentPath == PagePaths.COMPOSE_MESSAGE ||
        // …the user opened the compose Tweet dialog.
        location.pathname == PagePaths.COMPOSE_TWEET ||
        // …the user closed the compose Tweet dialog.
        currentPath == PagePaths.COMPOSE_TWEET ||
        // …the notification count in the title changed.
        notificationCount != currentNotificationCount
      )) {
    log('ignoring title change on separated tweets timeline')
    currentNotificationCount = notificationCount
    currentPath = location.pathname
    setTitle(separatedTweetsTimelineTitle)
    return
  }

  // Restore display of the separated tweets timelne if it's the last one we
  // saw, and the user navigated back home without using the Home navigation
  // item.
  if (location.pathname == PagePaths.HOME &&
      currentPath != PagePaths.HOME &&
      !homeNavigationWasUsed &&
      lastMainTimelineTitle != null &&
      separatedTweetsTimelineTitle != null &&
      lastMainTimelineTitle == separatedTweetsTimelineTitle) {
    log('restoring display of the separated tweets timeline')
    currentNotificationCount = notificationCount
    currentPath = location.pathname
    setTitle(separatedTweetsTimelineTitle)
    return
  }

  // Assumption: all non-FOUT, non-duplicate title changes are navigation, which
  // need the page to be re-processed.

  currentPage = newPage
  currentNotificationCount = notificationCount
  currentPath = location.pathname

  if (isOnMainTimelinePage()) {
    lastMainTimelineTitle = currentPage
  }

  log('processing new page')

  processCurrentPage()
}

/**
 * Processes all Twitter Blue checks inside an element.
 * @param {HTMLElement} $el
 */
function processBlueChecks($el) {
  for (let $svg of $el.querySelectorAll(`${Selectors.VERIFIED_TICK}:not(.tnt_blue_check)`)) {
    if (isBlueVerified($svg)) {
      blueCheck($svg)
    }
  }
}

function processCurrentPage() {
  if (pageObservers.length > 0) {
    log(
      `disconnecting ${pageObservers.length} page observer${s(pageObservers.length)}`,
      pageObservers.map(observer => observer['name'])
    )
    pageObservers.forEach(observer => observer.disconnect())
    pageObservers = []
  }

  // Hooks for styling pages
  $body.classList.toggle('Community', isOnCommunityPage())
  $body.classList.toggle('Explore', isOnExplorePage())
  $body.classList.toggle('HideSidebar', shouldHideSidebar())
  $body.classList.toggle('List', isOnListPage())
  $body.classList.toggle('MainTimeline', isOnMainTimelinePage())
  $body.classList.toggle('Notifications', isOnNotificationsPage())
  $body.classList.toggle('Profile', isOnProfilePage())
  if (!isOnProfilePage()) {
    $body.classList.remove('Blocked', 'NoMedia')
  }
  $body.classList.toggle('QuoteTweets', isOnQuoteTweetsPage())
  $body.classList.toggle('Tweet', isOnIndividualTweetPage())
  $body.classList.toggle('Search', isOnSearchPage())
  $body.classList.toggle('MobilePhoto', mobile && URL_PHOTO_RE.test(location.pathname))
  $body.classList.remove('TabbedTimeline')
  $body.classList.remove('SeparatedTweets')

  if (desktop) {
    if (config.twitterBlueChecks != 'ignore' || config.fullWidthContent && (isOnMainTimelinePage() || isOnListPage())) {
      observeSidebar()
    } else {
      $body.classList.remove('Sidebar')
    }
  }

  if (config.twitterBlueChecks != 'ignore' && (isOnSearchPage() || isOnExplorePage())) {
    observeSearchForm()
  }

  if (isOnMainTimelinePage()) {
    tweakMainTimelinePage()
  }
  else {
    removeMobileTimelineHeaderElements()
  }

  if (isOnProfilePage()) {
    tweakProfilePage()
  }
  else if (isOnFollowListPage()) {
    tweakFollowListPage()
  }
  else if (isOnIndividualTweetPage()) {
    tweakIndividualTweetPage()
  }
  else if (isOnNotificationsPage()) {
    tweakNotificationsPage()
  }
  else if (isOnSearchPage()) {
    tweakSearchPage()
  }
  else if (isOnQuoteTweetsPage()) {
    tweakQuoteTweetsPage()
  }
  else if (isOnListPage()) {
    tweakListPage()
  }
  else if (isOnExplorePage()) {
    tweakExplorePage()
  }
  else if (isOnBookmarksPage()) {
    tweakBookmarksPage()
  }
  else if (isOnCommunitiesPage()) {
    tweakCommunitiesPage()
  }
  else if (isOnCommunityPage()) {
    tweakCommunityPage()
  }
  else if (isOnCommunityMembersPage()) {
    tweakCommunityMembersPage()
  }

  // Om mobile, these are pages instead of modals
  if (mobile) {
    if (URL_CIRCLE_RE.test(currentPath)) {
      tweakMobileTwitterCirclePage()
    }
    else if (currentPath == PagePaths.COMPOSE_TWEET) {
      tweakMobileComposeTweetPage()
    }
  }
}

/**
 * The mobile version of Twitter reuses heading elements between screens, so we
 * always remove any elements which could be there from the previous page and
 * re-add them later when needed.
 */
function removeMobileTimelineHeaderElements() {
  if (mobile) {
    document.querySelector('#tnt_separated_tweets_tab')?.remove()
  }
}

/**
 * Sets the page name in <title>, retaining any current notification count.
 * @param {string} page
 */
function setTitle(page) {
  document.title = ltr ? (
    `${currentNotificationCount}${page} / ${getString('TWITTER')}`
  ) : (
    `${currentNotificationCount}${getString('TWITTER')} \\ ${page}`
  )
}

/**
 * @param {import("./types").TimelineItemType} type
 * @returns {boolean}
 */
function shouldHideListTimelineItem(type) {
  switch (type) {
    case 'RETWEET':
    case 'RETWEETED_QUOTE_TWEET':
      return config.listRetweets == 'hide'
    case 'UNAVAILABLE_QUOTE_TWEET':
      return config.hideUnavailableQuoteTweets
    case 'UNAVAILABLE_RETWEET':
      return config.hideUnavailableQuoteTweets || config.listRetweets == 'hide'
    default:
      return false
  }
}

/**
 * @param {import("./types").TimelineItemType} type
 * @param {string} page
 * @returns {boolean}
 */
function shouldHideMainTimelineItem(type, page) {
  switch (type) {
    case 'QUOTE_TWEET':
      return shouldHideSharedTweet(config.quoteTweets, page)
    case 'RETWEET':
      return shouldHideSharedTweet(config.retweets, page)
    case 'RETWEETED_QUOTE_TWEET':
      return shouldHideSharedTweet(config.retweets, page) || shouldHideSharedTweet(config.quoteTweets, page)
    case 'TWEET':
      return page == separatedTweetsTimelineTitle
    case 'UNAVAILABLE_QUOTE_TWEET':
      return config.hideUnavailableQuoteTweets || shouldHideSharedTweet(config.quoteTweets, page)
    case 'UNAVAILABLE_RETWEET':
      return config.hideUnavailableQuoteTweets || shouldHideSharedTweet(config.retweets, page)
    default:
      return true
  }
}

/**
 * @param {import("./types").TimelineItemType} type
 * @returns {boolean}
 */
 function shouldHideOtherTimelineItem(type) {
  switch (type) {
    case 'QUOTE_TWEET':
    case 'RETWEET':
    case 'RETWEETED_QUOTE_TWEET':
    case 'TWEET':
    case 'UNAVAILABLE':
    case 'UNAVAILABLE_QUOTE_TWEET':
    case 'UNAVAILABLE_RETWEET':
      return false
    default:
      return true
  }
}

/**
 * @param {import("./types").SharedTweetsConfig} config
 * @param {string} page
 * @returns {boolean}
 */
function shouldHideSharedTweet(config, page) {
  switch (config) {
    case 'hide': return true
    case 'ignore': return page == separatedTweetsTimelineTitle
    case 'separate': return page != separatedTweetsTimelineTitle
  }
}

async function tweakBookmarksPage() {
  if (config.twitterBlueChecks != 'ignore') {
    observeTimeline(currentPage, {
      classifyTweets: false,
    })
  }
}

async function tweakExplorePage() {
  if (!config.hideExplorePageContents) return

  let $searchInput = await getElement('input[data-testid="SearchBox_Search_Input"]', {
    name: 'explore page search input',
    stopIf: () => !isOnExplorePage(),
  })
  if (!$searchInput) return

  log('focusing search input')
  $searchInput.focus()

  if (mobile) {
    // The back button appears after the search input is focused on mobile. When
    // you tap it or otherwise navigate back, it's replaced with the slide-out
    // menu button and Explore page contents are shown - we want to skip that.
    let $backButton = await getElement('div[data-testid="app-bar-back"]', {
      name: 'back button',
      stopIf: () => !isOnExplorePage(),
    })
    if (!$backButton) return

    pageObservers.push(
      observeElement($backButton.parentElement, (mutations) => {
        mutations.forEach((mutation) => {
          mutation.addedNodes.forEach((/** @type {HTMLElement} */ $el) => {
            if ($el.querySelector('[data-testid="DashButton_ProfileIcon_Link"]')) {
              log('slide-out menu button appeared, going back to skip Explore page')
              history.go(-2)
            }
          })
        })
      }, 'back button parent')
    )
  }
}

function tweakCommunitiesPage() {
  observeTimeline(currentPage)
}

function tweakCommunityPage() {
  if (config.twitterBlueChecks != 'ignore') {
    observeTimeline(currentPage, {
      classifyTweets: false,
      isTabbed: true,
      tabbedTimelineContainerSelector: `${Selectors.PRIMARY_COLUMN} > div > div:last-child`,
      onTimelineAppeared() {
        // The About tab has static content at the top which can include a check
        if (/\/about\/?$/.test(location.pathname)) {
          processBlueChecks(document.querySelector(Selectors.PRIMARY_COLUMN))
        }
      }
    })
  }
}

function tweakCommunityMembersPage() {
  if (config.twitterBlueChecks != 'ignore') {
    observeTimeline(currentPage, {
      classifyTweets: false,
      isTabbed: true,
      timelineSelector: 'div[data-testid="primaryColumn"] > div > div:last-child',
    })
  }
}

function tweakFollowListPage() {
  if (config.twitterBlueChecks != 'ignore') {
    observeTimeline(currentPage, {
      classifyTweets: false,
    })
  }
}

function tweakIndividualTweetPage() {
  observeTimeline(currentPage, {
    hideHeadings: false,
  })
}

function tweakListPage() {
  observeTimeline(currentPage, {
    hideHeadings: false,
  })
}

async function tweakTweetBox() {
  if (config.twitterBlueChecks == 'ignore') return

  let $tweetTextarea = await getElement(`${desktop ? 'div[data-testid="primaryColumn"]': 'main'} label[data-testid^="tweetTextarea"]`, {
    name: 'tweet textarea',
    stopIf: pageIsNot(currentPage),
  })
  if (!$tweetTextarea) return

  /** @type {HTMLElement} */
  let $typeaheadDropdown

  pageObservers.push(
    observeElement($tweetTextarea.parentElement.parentElement.parentElement.parentElement, (mutations) => {
      for (let mutation of mutations) {
        if ($typeaheadDropdown && mutations.some(mutation => Array.from(mutation.removedNodes).includes($typeaheadDropdown))) {
          disconnectPageObserver('tweet textarea typeahead dropdown')
          $typeaheadDropdown = null
        }
        for (let $addedNode of mutation.addedNodes) {
          if ($addedNode instanceof HTMLElement && $addedNode.getAttribute('id')?.startsWith('typeaheadDropdown')) {
            $typeaheadDropdown = $addedNode
            pageObservers.push(
              observeElement($typeaheadDropdown, () => {
                processBlueChecks($typeaheadDropdown)
              }, 'tweet textarea typeahead dropdown')
            )
          }
        }
      }
    }, 'tweet textarea typeahead dropdown container')
  )
}

function tweakMainTimelinePage() {
  if (desktop) {
    tweakTweetBox()
  }

  let $timelineTabs = document.querySelector(`${mobile ? Selectors.MOBILE_TIMELINE_HEADER_NEW : Selectors.PRIMARY_COLUMN} nav`)

  // "Which version of the main timeline are we on?" hooks for styling
  $body.classList.toggle('TabbedTimeline', $timelineTabs != null)
  $body.classList.toggle('SeparatedTweets', isOnSeparatedTweetsTimeline())

  if ($timelineTabs == null) {
    warn('could not find timeline tabs')
    return
  }

  tweakTimelineTabs($timelineTabs)

  // If there are pinned lists, the timeline tabs <nav> will be replaced when they load
  pageObservers.push(
    observeElement($timelineTabs.parentElement, (mutations) => {
      let timelineTabsReplaced = mutations.some(mutation => Array.from(mutation.removedNodes).includes($timelineTabs))
      if (timelineTabsReplaced) {
        log('timeline tabs replaced')
        $timelineTabs = document.querySelector(`${mobile ? Selectors.MOBILE_TIMELINE_HEADER_NEW : Selectors.PRIMARY_COLUMN} nav`)
        tweakTimelineTabs($timelineTabs)
      }
    }, 'timeline tabs nav container')
  )

  observeTimeline(currentPage, {
    isTabbed: true,
    onTabChanged: () => {
      wasForYouTabSelected = Boolean($timelineTabs.querySelector('div[role="tablist"] > div:first-child > a[aria-selected="true"]'))
    },
    tabbedTimelineContainerSelector: 'div[data-testid="primaryColumn"] > div > div:last-child > div',
  })
}

function tweakMobileComposeTweetPage() {
  tweakTweetBox()
}

async function tweakMobileTwitterCirclePage() {
  let $tabContentContainer = await getElement('main > div > div > div:last-child:not(:first-child)', {
    name: 'circle page tab content container',
    stopIf: pageIsNot(currentPage),
  })

  if ($tabContentContainer == null) return

  pageObservers.push(observeElement($tabContentContainer, (mutations) => {
    // Ignore loading indicators on initial load of each tab
    if (!mutations.length || mutations.some(mutation => mutation.addedNodes[0]?.querySelector('svg circle'))) {
      return
    }
    observeTwitterCircleTabContent($tabContentContainer.firstElementChild, pageObservers, disconnectPageObserver)
  }, 'circle page tab content container'))
}

async function tweakTimelineTabs($timelineTabs) {
  let $followingTabLink = /** @type {HTMLElement} */ ($timelineTabs.querySelector('div[role="tablist"] > div:nth-child(2) > a'))

  if (config.alwaysUseLatestTweets && !document.title.startsWith(separatedTweetsTimelineTitle)) {
    let isForYouTabSelected = Boolean($timelineTabs.querySelector('div[role="tablist"] > div:first-child > a[aria-selected="true"]'))
    if (isForYouTabSelected && (!wasForYouTabSelected || config.hideForYouTimeline)) {
      log('switching to Following timeline')
      $followingTabLink.click()
      wasForYouTabSelected = false
    } else {
      wasForYouTabSelected = isForYouTabSelected
    }
  }

  if (config.retweets == 'separate' || config.quoteTweets == 'separate') {
    let $newTab = /** @type {HTMLElement} */ ($timelineTabs.querySelector('#tnt_separated_tweets_tab'))
    if ($newTab) {
      log('separated tweets timeline tab already present')
      $newTab.querySelector('span').textContent = separatedTweetsTimelineTitle
    }
    else {
      log('inserting separated tweets tab')
      $newTab = /** @type {HTMLElement} */ ($followingTabLink.parentElement.cloneNode(true))
      $newTab.id = 'tnt_separated_tweets_tab'
      $newTab.querySelector('span').textContent = separatedTweetsTimelineTitle

      // This script assumes navigation has occurred when the document title
      // changes, so by changing the title we fake navigation to a non-existent
      // page representing the separated tweets timeline.
      $newTab.querySelector('a').addEventListener('click', (e) => {
        e.preventDefault()
        e.stopPropagation()
        if (!document.title.startsWith(separatedTweetsTimelineTitle)) {
          // The sparated tweets tab belongs to the Following tab
          let isFollowingTabSelected = Boolean($timelineTabs.querySelector('div[role="tablist"] > div:nth-child(2) > a[aria-selected="true"]'))
          if (!isFollowingTabSelected) {
            log('switching to the Following tab for separated tweets')
            $followingTabLink.click()
          }
          setTitle(separatedTweetsTimelineTitle)
        }
        window.scrollTo({top: 0})
      })
      $followingTabLink.parentElement.insertAdjacentElement('afterend', $newTab)

      // Return to the main timeline view when any other tab is clicked
      $followingTabLink.parentElement.parentElement.addEventListener('click', () => {
        if (location.pathname == '/home' && !document.title.startsWith(getString('HOME'))) {
          log('setting title to Home')
          homeNavigationIsBeingUsed = true
          setTitle(getString('HOME'))
        }
      })

      // Return to the main timeline when the Home nav link is clicked
      let $homeNavLink = await getElement(Selectors.NAV_HOME_LINK, {
        name: 'home nav link',
        stopIf: pathIsNot(currentPath),
      })
      if ($homeNavLink && !$homeNavLink.dataset.tweakNewTwitterListener) {
        $homeNavLink.addEventListener('click', () => {
          homeNavigationIsBeingUsed = true
          if (location.pathname == '/home' && !document.title.startsWith(getString('HOME'))) {
            setTitle(getString('HOME'))
          }
        })
        $homeNavLink.dataset.tweakNewTwitterListener = 'true'
      }
    }
  } else {
    removeMobileTimelineHeaderElements()
  }
}

function tweakNotificationsPage() {
  let $navigationTabs = document.querySelector(`${mobile ? Selectors.MOBILE_TIMELINE_HEADER_NEW : Selectors.PRIMARY_COLUMN} nav`)
  if ($navigationTabs == null) {
    warn('could not find Notifications tabs')
    return
  }

  if (config.hideVerifiedNotificationsTab) {
    let isVerifiedTabSelected = Boolean($navigationTabs.querySelector('div[role="tablist"] > div:nth-child(2):nth-last-child(2) > a[aria-selected="true"]'))
    if (isVerifiedTabSelected) {
      log('switching to All tab')
      $navigationTabs.querySelector('div[role="tablist"] > div:nth-child(1) > a')?.click()
    }
  }

  if (config.twitterBlueChecks != 'ignore') {
    observeTimeline(currentPage, {
      classifyTweets: false,
      isTabbed: true,
      tabbedTimelineContainerSelector: 'div[data-testid="primaryColumn"] > div > div:last-child',
    })
  }
}

function tweakProfilePage() {
  if (config.twitterBlueChecks != 'ignore') {
    if (mobile) {
      processBlueChecks(document.querySelector(Selectors.MOBILE_TIMELINE_HEADER_NEW))
    }
    processBlueChecks(document.querySelector(Selectors.PRIMARY_COLUMN))
  }
  observeTimeline(currentPage)
  if (desktop && config.hideSidebarContent) {
    observeProfileBlockedStatus(currentPage)
    observeProfileSidebar(currentPage)
  }
}

function tweakQuoteTweetsPage() {
  if (config.twitterBlueChecks != 'ignore') {
    observeTimeline(currentPage)
  }
}

function tweakSearchPage() {
  let $searchTabs = document.querySelector(`${mobile ? Selectors.MOBILE_TIMELINE_HEADER_NEW : Selectors.PRIMARY_COLUMN} nav`)
  if ($searchTabs != null) {
    if (config.defaultToLatestSearch) {
      let isTopTabSelected = Boolean($searchTabs.querySelector('div[role="tablist"] > div:nth-child(1) > a[aria-selected="true"]'))
      if (isTopTabSelected) {
        log('switching to Latest tab')
        $searchTabs.querySelector('div[role="tablist"] > div:nth-child(2) > a')?.click()
      }
    }
  } else {
    warn('could not find Search tabs')
  }

  observeTimeline(currentPage, {
    hideHeadings: false,
    isTabbed: true,
    tabbedTimelineContainerSelector: 'div[data-testid="primaryColumn"] > div > div:last-child > div',
  })
}
//#endregion

//#region Main
async function main() {
  let $settings = /** @type {HTMLScriptElement} */ (document.querySelector('script#tnt_settings'))
  if ($settings) {
    try {
      Object.assign(config, JSON.parse($settings.innerText))
    } catch(e) {
      error('error parsing initial settings', e)
    }

    let settingsChangeObserver = new MutationObserver(() => {
      /** @type {Partial<import("./types").Config>} */
      let configChanges
      try {
        configChanges = JSON.parse($settings.innerText)
      } catch(e) {
        error('error parsing incoming settings change', e)
        return
      }

      if ('debug' in configChanges) {
        log('disabling debug mode')
        debug = configChanges.debug
        log('enabled debug mode')
        configureThemeCss()
        return
      }

      Object.assign(config, configChanges)
      configChanged(configChanges)
    })
    settingsChangeObserver.observe($settings, {childList: true})
  }

  if (config.debug) {
    debug = true
  }

  let $appWrapper = await getElement('#layers + div', {name: 'app wrapper'})

  $html = document.querySelector('html')
  $body = document.body
  lang = $html.lang
  dir = $html.dir
  ltr = dir == 'ltr'
  let lastFlexDirection

  observeElement($appWrapper, () => {
    let flexDirection = getComputedStyle($appWrapper).flexDirection

    mobile = flexDirection == 'column'
    desktop = !mobile

    /** @type {'mobile' | 'desktop'} */
    let version = mobile ? 'mobile' : 'desktop'

    if (version != config.version) {
      log('setting version to', version)
      config.version = version
      // Let the options page know which version is being used
      storeConfigChanges({version})
    }

    if (lastFlexDirection == null) {
      log('initial config', {config, lang, version})

      // One-time setup
      checkReactNativeStylesheet()
      observeBodyBackgroundColor()
      observeColor()

      // Repeatable configuration setup
      configureSeparatedTweetsTimelineTitle()
      configureCss()
      observeHtmlFontSize()
      observePopups()

      // Start watching for page changes
      observeTitle()
    }
    else if (flexDirection != lastFlexDirection) {
      observeHtmlFontSize()
      configChanged({version})
    }

    $body.classList.toggle('Mobile', mobile)
    $body.classList.toggle('Desktop', desktop)

    lastFlexDirection = flexDirection
  }, 'app wrapper class attribute for version changes (mobile ↔ desktop)', {
    attributes: true,
    attributeFilter: ['class']
  })
}

/**
 * @param {Partial<import("./types").Config>} changes
 */
function configChanged(changes) {
  log('config changed', changes)

  configureCss()
  configureFont()
  configureNavFontSizeCss()
  configureThemeCss()
  observePopups()

  // Only re-process the current page if navigation wasn't already triggered
  // while applying the following config changes (if there were any).
  let navigationTriggered = (
    configureSeparatedTweetsTimelineTitle() ||
    checkforDisabledHomeTimeline()
  )
  if (!navigationTriggered) {
    processCurrentPage()
  }
}

main()
//#endregion

}()