

5·
5 months agoSo, this is a more involved approach and it’s not a Firefox add-on but I thought I’d mention it:
https://fnordig.de/til/Machine-Translation/bergamot-subtitles.html
You’d play the YT videos outside the browser using mpv in combination with yt-dlp and an mpv lua script would do the translation locally using the Bergamot engine (which happens to be Mozilla’s translation engine). Could be adapted to use other engines too.
Not sure what’s causing the UI issues but another way to go about this is to create a custom collection and configure your browser to use it. This way you can control what shows up in “recommended”. IIRC you have to use nightly, beta or a custom build like Fennec to allow using a custom collection.
instructions for managing collections
making FF user a custom collection
collections web UI