> Chrome had the advantage for a long term because their dev tools were just so much better than Firebug in both features and performance. Even today, I can't pinpoint it to specific things because it's (relatively) little and subtle differences, but Chrome's dev tools feel way more polished than Firefox's.

My point exactly! You're talking about which browser to use for web development. That's not relevant for engineers not touching html/js/css, and for all non tech savvy family members whose computers we set up.

Interesting, in my murky memory Chrome's developer tools were at most "quite decent" but for a long period of time could hardly compete with Firefox's, maybe even with mere Firebug. It it true that in total "feature count" Chrome most probably leads now, and especially recently they seem to adapt features that used to be Firefox exclusive in remarkably increasing rate. But I really do not remember being blown away by Chrome's devtools, like, ever, actually. Even today I pretty much prefer Firefox Developer Tools over Chrome's, because they mostly has more features I actually need and also feel way less cluttered. Most of the times I need to do anything with Chrome's devtools it takes me just a little moment to stumble upon some missing detail I am used to (for example overflow/layout/event listeners badges directly in the DOM inspector tree) or to be mildly offended by unfamiliar (or missing) keybinding, or confusing layout. There are quite a few features In Chrome that I'd like to see in Firefox (command palette for example), but still prefer "living" in Fx albeit without them.

Yes, al subjective, biased and anecdotal, but wanted to leave one real (yet still virtual) vote in favour of Firefox's Developer Tools here.