My father, who is very non-technical has never left Firefox and stuck with it for decades, even against Microsoft and Chrome's tactics to try to claim default browser and constantly install them into his face. My father particularly hates Chrome because he never understands how it keeps reinstalling itself despite his best efforts. His taskbar is often a mess of all three browsers because he can't figure out how to keep Edge and Chrome unpinned. My father sees Chrome installing itself and auto-pinning to his taskbar and Start Menu as the
exact same IE-level adware/spyware shenanigans that led to him fleeing to Firefox in the first place.
I returned to Firefox again after years of IE8+ and Spartan Edge. I've never liked the "mouthfeel" of Chrome, have generally felt it to be bloated and slow and ad-heavy adware (though not as strongly as my father and I often do know how Chrome gets backdoor installed through shameful adware deals like with Adobe), and when Edge switched to being just another Chromium I still felt the same in my dislike of Chromium and I went back to Firefox. (Spartan Edge had so much better performance and battery usage than Chromium. It's death was not mourned by enough people.)
Feel free to correlate these two counter-anecdotes with more and see if you find some patterns to reach your own conclusion. That's the fun of anecdata and marketing, there are patterns on every side, you can interpret it how you want. "Popularity" isn't facts, pattern matching based on popularity of certain anecdotes can lead to incorrect conclusions. Especially when Marketing is involved. Marketing is about making popular things that aren't necessarily facts, especially when an advertiser is unscrupulous and no one is busy enforcing truth in advertising laws.