I'm a firefox-only user, and I read your comment in two ways. It's grumpy, but also on the point! Thanks, I feel similarly. What is your main browser btw?
FF works for me in great ways, and I am highly productive with it, as long as some plugins still work: uBlock, tridactyl, foxyproxy. And for UI: sidebery, stylus.
From time to time I feel I should turn my back towards FF when they come up with new decisions in their UI, which I drastically reduce (no menu, no tabs,...), or new features, which are more disturbing than helping.
On android, I discovered 'kiwi browser' which is FF based but does not blacklist the plugins.