Not yet.
Per
Dit script moet niet direct worden geïnstalleerd - het is een bibliotheek voor andere scripts om op te nemen met de meta-richtlijn // @require https://update.greatest.deepsurf.us/scripts/2599/7462/GM%202%20port%20-%20Function%20Override%20Helper.js
GreasyMonkey 2.x Beta will break lots scripts, this library has made to help function hooking.
It provides 2.x API exportFunction and cloneInto for 1.x support (Which is just dummy sandbox).
It's well documented(Should be..) in source.
Fix this problem when hooking prototype / Object function.
return foo.apply({}, args); -> return foo.apply(this, args);
return bak.apply ({}, arguments); -> return bak.apply (this, arguments);
document.body -> document.head, to prevent document.body is null error.