This script disables YouTube's new rounded corners (reverts back to the previous layout before 2022 with extra stuff included.)
Ekde
Note: If you are using an old browser including Pale Moon, You can get the legacy version here.
https://greatest.deepsurf.us/en/scripts/459222
Both of these are required (Make sure you install Stylus extension for the CSS adjustments/fixes)!
CSS adjustments/fixes for non-rounded YouTube design - https://userstyles.world/style/7243
YouTube use non-rounded search box - https://userstyles.world/style/8783
Return YouTube Dislike (two choices are above):
Web Extension (Chrome, Firefox, Edge, Opera, etc...) - https://www.returnyoutubedislike.com/install
Legacy Version JS (if you are using a version of Chromium that lacks MV3) - https://pastebin.com/raw/ddZV9YGu
