Yes, Firefox has quite a few issues, starting from strange UI decisions (tabs that don't look like tabs, etc.), product integration (Pocket) and promotion (Firefox VPN in private mode window), compatibility issues with video conferencing applications (MS Teams, Facetime, probably others). But compared to other browsers, you can customize browser and solve quite a few of them, unlike in other competing browsers, where what you get, that you are forced to use and cannot change. I'd only wish Firefox developers (or management team) would take customization more seriously, as it is one of main selling features, that few users know about.
I'm still missing the "share tab" option in Google and Jitsi Meet, without it work meetings get a lot less private. I've found a pretty good plugin to fix the 'tabs that don't look like tabs' design problem, though it's a real pain in the ass to install and a major problem when switching to new devices. I'm not sure why they changed that, the old design was a lot clearer. On the other hand the fact that it doesn't support Chromecast is a big plus, since that's impossible to turn off in Chrome with recent updates and can it be problematic if you're not the owner of all Chromecasts on your damn network.
As of right now Firefox stays the side browser for code testing and whatnot, but it falls short for daily use for me.
