Firefox on ChromeOS sucks though. Just went through this, tried Canary, etc. Went back to Chrome.
I don't know if this qualifies for your definition of alternative, but ChromiumOS does exist https://www.chromium.org/chromium-os/
Here is one example: Firefox's tracking of the mouse cursor is broken, and often (yes, it's inconsistent) applies a vector translation so when trying to click something like a button or menu, the cursor needs to be about 100 x-y pixels away from the target. Only Firefox native UI is affected. These are My_First_Program.app tier bugs that should not exist in mature, 20 year old software.
Phoenix 0.1 didn't have this many beginner bugs. Mozilla has lost its way and only continues to exist because Google funds them to be a paper tiger competitor. Opera sold out to the Chinese. Microsoft gave up and now simps Google. Apple only supports their own platform. What is left?
While I've not noticed that myself, just yesterday I noticed something similarly weird.
I had a Safari window that was persistently half the screen width and height away from where the mouse was. As in: click to drag, and the whole window jumped half the screen down and to the right, so I couldn't get it to any other quadrant of any screen. Fixed on restarting the app.
I don't know if that was an app bug or an OS bug, but in either case it's Apple's fault.
How did we get to this?
So, if no one reports the bug, how do you expect the bug to get fixed? Instead, you just keep harking back on that unfixed bug whenever Firefox conversations come up and you can be like "but this bug has been around and no one has fixed it"
Firefox is notorious for having bugs open in core features for over a decade! I’ve found outright broken code, narrowed it down to the specific line, included documentation references, repro steps, etc… only to be totally ignored by the devs. I did get comments from several thousand other frustrated users, but never a Mozilla employee other than the occasional generic or automated housekeeping message.
Sadly the Mozilla Foundation has been overrun by special interest groups that simply want to suckle at the teat of Google funding. Millions of dollars are allocated to outright corruption, but very nearly zero to development of Firefox itself.
It’s a slow but certain road from here to a sad end.
Why would I or anyone else pretend otherwise? At the expense of our own time and effort no less?
Maybe they should learn how to test software properly instead of squandering their money on nonsense features nobody asked for.
Hyperbole much?