Firefox's user base was a third of all internet users a little over 10 years ago. Now it's as little as 5%.
The "the users are wrong" attitude might not have been the main cause of the decline but it has been a real factor, IMO.
> Same with the more recent change ragrding tabs. I am using firefox for a very long time now, and I just don't see that firefox is massively going downhill so far, like many people seem to suggest. Of course I am bummed out that certain features could not be retained (such as installable PWAs on desktop). But these are just the realities of the fact that it is hard to compete with google.
In Firefox's heyday when they were a scrappy underdog they took on King Kong on its home turf (the Windows desktop) and won (or at least took a huge chunk of market share). The idea that what has now become a big rich company that makes nearly half a billion dollars a year from their browser somehow doesn't have the resources to make that browser competitive is hard to believe.
What about Opera? Did FF decline quality wise against that? Or Safari? No, of course not. FF didn't decline, it now has a real formidable competitor.
Firefox got popular when they listened to users and made a product people wanted.
They did this despite fierce competition from a huge monopolistic company with quite a locked in and anticompetitive platform.
And today they make something crazy like a half billion dollars a year from firefox, they have enough resources to make a competitive browser.
Also, they still make a competetive browser, as I laid out. Just the fact that some of the competition has improved massively (but by no means all of it) doesn't change that.
Competition has improved but so has firefox. Why should the expectation be that they stood still while everybody else went ahead? And it absolutely has declined. You also did say that they don't have features you want and seemed to imply that was part of the realities of not having enough resources or struggling to compete with google. Just doesn't seem like the reason holds water.
They certainly listened to their users and potential users.