so whenever i am browsing forums or internets in general, inevitably some youtube videos are gonna come up. after maybe 10 minutes of browsing (not necessarily just youtube, but a youtube video i viewed), would just pop up on firefox, and the page would not respond for maybe 10 seconds, then after that, it recovers and works fine. almost like for some reason recent history from youtube is affecting it. so for example, this is what i would see. Sometimes the image is stretched or repeating to the bottom of the page.
This never happens in safe mode, but it still happens in regular firefox if i disable all the add ons.