RX 560 crash on Firefox playing YT videos (in random way, random playtime, one play - not crashing, second same video - crash ). Full screen only, I think. I use latest Adrenaline drivers.
https://community.amd.com/message/2959156?commentID=2959156#comment-2959156
Downgrade to 19.12.1 before they fix it.
Normally unchecking hardware acceleration is the fix for this...either in the browser or the video its self.