Wanna plug LibRedirect which allows you to easily set up proxies for any site (e.g. invideous for youtube, nitter for twitter, libreddit/redlib/whatever for reddit, breezewiki for fandom, etc)

https://addons.mozilla.org/en-US/firefox/addon/libredirect/

https://libredirect.manerakai.com/

Most of the proxies are built in/drop-down options but you can add any custom proxy too.