Comment by jasonfarnon
Comment by jasonfarnon 2 days ago
I get serious slowdown with multiple (3--5) youtube tabs open in firefox, but not chrome. Seems to happen when tabs are open for a long time (weeks), so probably some leak. Lots of others mention it on forums.
Google has a history of sabatoging Youtube on Firefox. See for example https://www.tomshardware.com/news/youtube-responds-to-delaye....
It isn't unique to youtube either. Gmail offline mode only works on chrome, even though other browsers have the necessary APIs. And menu copy and paste in google docs uses a special chrome-only extension that google pre-installs in chrome, instead of the clipboard API that works in other browsers as well.