I'm a FF user since the early 00's and Firefox will mostly not go away because Google has an interest in using it against monopoly accusations but the reality is bleak..
And the reality is these people ( Google in this case ) are so far removed from any moral compass about the Web ( at least what most people here think of "the Web" ) that it's near impossible to do anything about it. These companies are huge and from top to bottom there are certain groups that are hired guns to do a job, no matter what "job" it is, they'll do it, achieve those KPIs, get promoted, get paid. Even for their own detriment in the future, it doesn't matter. Big money now, screw the rest.
Btw, this is how every big company operated since forever, the only "news" here is the disproportionate impact their acts do to the World due to their huge size and influence.
I mostly use maps via an app (Apple or Google, they seem to be the same for basic use). Usually if I’m using a map, I’ll be using it in my car for navigation, so Firefox doesn’t even come to mind.
I suspect, on top of the “maybe it is internal apps” thing I mentioned at first, some of the really bad sites are the really interactive ones, I probably just use the app without even thinking of it.
So its a regular drag for me. If I really need to move quick to find something, I'll begrudgingly open chrome.