I think in each step the choices Firefox made usually made sense. As Firefox removed or changed features at each juncture they really tried to choose what would work for the most people. A kind of utilitarian product design. And yet it declined, and the critique here isn't entirely wrong (but I think it's mostly wrong). Neither the path Firefox took, nor the path described here, would be enough to stop that decline.…
I've been using an older version of Waterfox for years now because it kept the things that made Firefox great for me. However, as more and more websites are unusable with an old browser, I finally reached a tipping point that forced me to switch to something more recent.
I investigated every (as near as I can tell) offering on the market today. Sadly, the modern Firefox was the least bad option after all, so I'm now using that.
I despair for the state of web browsers these days.