As a developer, Chrome's tools are pretty good. As a user, the sync options for history and bookmarks are what keep me in. It's definitely not perfect but it's fine for now. I like Firefox but not enough to switch
I was first a Firefox user, switched to Chrome, back to FF and finally to Chrome once I got a smart phone and they added sync
For web development, it's kinda mandatory as nobody wants a site that doesn't work in the most popular browser. That doesn't mean you have to use it for browsing as well though- I found that having Chrome for testing / debugging and Firefox for browsing was quite a productive setup last time I did web dev.
Chrome's dev tools just work better for me, too. For instance, when there's an error in the console, clicking on the filename/line does nothing most of the time in Firefox now. I once fixed it by resetting firefox (per some instructions on the web) but it broken again within days.
Chrome's just works, every time.
Oddly, it sorta worked for me in FF the other day, but it took me to the minified source, which wasn't terribly helpful in an app that I'm writing.
I still use Firefox 99% of the time, but it really pains me that that one feature is so broken.
Firefox's tools are still competitive with Chrome and there are even a few things I miss about them when debugging in Brave. It gives a little joy to know that Mozilla is still competitive in something, but not holding my breath for it to stay that way.
I was first a Firefox user, switched to Chrome, back to FF and finally to Chrome once I got a smart phone and they added sync