Is there no option for general subtitles / closed captioning?

I don’t see any accessibility options on firefox, I am ADHD and use closed captions / subtitles to help with paying attention to videos, I recently switched from chrome to firefox due to performance issues but i cant find any options for general closed captioning, not even any third party extentions

and no, i don’t mean uploading text files or having to do any fancy computer tricks or anything like that. ive read the description of the ‘captioning’ add ons and none of them actually seem to provide real time auto generated captions, like chrome has

its really something that should be standard, a lot of people have trouble with eyesight or focus retention, im hoping i am just missing it when I look, would be genuinely bizarre to not offer any sort of accessibility options