So I'm writing this review because I actually have a question. I've had to disable this because it makes youtube's theater mode work improperly for me. The theater mode is still big but the video itself is regular sized. Any fixes?

With Google slowing non-Chrome YouTube users, this is brilliant. Had noticed YouTube slowing but didn't know why - then found out and saw this recommended by Martin Brinkmann on ghacks.net, wow... instantly and noticeably faster. Thank you!

You are a king. I abhor the new site and the constant buffer and lag. Plus, the old design is a niche.

This does bring back the old yt layout but it cancels dark mode on yt and you can't enable dark mode while running this plug in.

Thanks!

https://www.reddit.com/r/waterfox/comments/d79hqv/-/f14xknq/

– background: https://redd.it/d4xgb2

Downloaded this because it told me exactly what it did (adds disable_polymer) and it works fine. Wasn't having issues with Youtube's performance, just it's looks, and this fixes it.

Save my Lifetime! Works well!

Great addon, thank you very much. Unfortunately, it fails to keep the non-polymer interface when refreshing a video page. A fix was to edit the "PREF" cookie and add "&f4=4000000&f5=30&f6=8" at the end.