I just checked it out. Seems that The Spiffing Brit is trying to break youtube or something and is having people open as many tabs of his livestream as they can to get as many views as they can.
I just checked it out. And to test, I opened 15 tabs in firefox and refreshed. Just fine lol. Not sure what problem that person has besides maybe too many firefox extensions.
I did the same and RAM usage on went up 20% for me. Using flatpak Firefox if that makes a difference. It's still responsive though as I type this comment.
Firefox Ram usage just kept going up during that stream for some reason. It was using 6GB of 8GB ram. Edge stayed at 2GB. The stream got boring after a while tho