He took “lets fuck up some commas” too seriously

I mean, there are history videos for things that are 1-2 years old too that are there to sum up everything known and explain things to people out of the loop

Anything containing WebGL and anything containing complex CSS/JS animations comes to mind, also Canvas (even though it rarely used, still lags like a motherfucker), Firefox really suffers in that regard, but they recently promised that they will fix it; and I remind you that because of hardware decoder legal ussues Firefox sucked very hard at 4K and 120 Hz YouTube on Linux for a long time too

There are others, commonly created because Firefox focuses on privacy, and so, for example, all internal website timers can only count by 0.1 seconds because anything less will open you to tracking vunerabilities, often settings sacrifice performance for data safety like this

Chrome defaultism, and so websites are usually made for Chrome, often disregarding testing on Firefox completely, and so they work a bit worse here and there

Also no Google connectivity

They probably meant that GNU holds half of the Linux desktop usage, and Chrome OS the other