Each of which depend on chrome and google’s decisions.

To be fair, that’s not much of a thing with windows

but who would have thought something that sounds as simple as wanting to RDP across 4 monitors would be so damn difficult.

The ubuntu unstability surprised me (not that I would recommend it anyways), but this didn’t. Isn’t RDP a proprietary protocol of Microsoft? Probably not too many use it in the Linux world

But if you’re pursuing a MSc, you shouldn’t be wasting your time with gaming either, so that’s not a problem… /s

About the other points.

I see your point, personally I prefer WebUsb, WebBluetooth and such to be completely missing, so it’s much less likely that a bug allows access to these to a site.

Bluring camera background seems to me very specific to webcams, and even if chromium based browsers will do it for you, I think you are better off with running OBS and it’s virtual webcam functionality, as it has been made for that purpose (video processing), and it can do much more if you want (including cropping, ways to improve video quality, or even do greenboxing). Introducing background bluring to the browser would mean more requests to add this or that effect (even if it should actually be the task of the web app), and I think it’s hard to maintain even a single such effect (that does not blur everything, but only certain parts of the image) if your devs don’t have extensive experience in video processing. This would be a feature that if introduced, either would break once and stay that way for quite some time, or would take significant development resources to find the problem and keep it working.

For me Firefox haven’t crashed once in a year or more, even though I’m a heavy user: using it every day for multiple hours as a “tab hoarder”, with quite a few addons.

I also rarely restart it, as I don’t turn off my computer completely, so the Firefox process is usually as old as the time of last system reboot.

I think you may have ran into a rare bug, that has got persisted in your browser profile.
You may create a new browser profile (e.g. on the about:profiles page) and set your things up there, and most likely it’ll be stable.
I think there’s also a “refresh Firefox” button somewhere where average people would look for it, but I don’t know where it is. But be aware that this will delete everything in Firefox, where’s if you create a new profile, the new profile will start with a clean slate and you can switch back and forth between the old one if you find out you need something from there (e.g. old passwords that you haven’t transferred, a specific about:config setting if you use those, addon settings, …), or even have them open at the same time.

You can use it via web perfectly fine

Except when they demand your phone number for access. Pathetic service.