If you don’t like what Google is doing, don’t pretend that Firefox does not exist. Do something instead. File bug reports, send patches, donate to those who are working on Firefox and countering Google.
If there were a good browser run by a different nonprofit org, I would support that.
I am posting from maintained Mozilla Firefox.
That would be impossible if FF would be dead.
According to these folks[0], Firefox has a 3.29% market share globally. They also claim there are 4.66 billion browser users globally.
If those numbers are correct, Firefox has a bit more than 150,000,000 users worldwide.
If my software had 150,000,000 users, I'd consider that wildly successful.
Other folks have different ideas/takes on that, I suppose. But it's food for thought nonetheless.
[0] https://backlinko.com/browser-market-share#worldwide-browser...
Edit: Fixed prose.