As a firefox and desktop linux user I don’t see any problem
Hardware video acceleration is fine now, and apparently has been for some time.
But e.g. Google Meet plainly refuses to blur the video call background when run on Firefox. It happily does that when running in Chromium.
And for a long time, there has been an issue where if you update Firefox with a linux package manager, you have to restart the whole browser, or the browser stops working. That isn't a problem on windows or mac (usually). And it isn't something you have to deal with with chromium on linux either.
That seems rather like a Google dark pattern where they take advantage of owning both sides of the communication channel to abuse some internal Chrome API that Firefox knows nothing about.
On ff I sync my add-ons, bookmarks and containers. What’s not to like?
Open a 1080p YouTube video and watch your processor get slammed. No, I do not want to install an unvetted third party plug-in. If nothing else, flag that the browser doesn’t support hardware acceleration when playing videos, in easy to understand terminology so I, and thousands of others don’t have to go troubleshoot exactly what is causing my computer to choke.