bottom navigation is a godsend these days as phone screens are 7". Also adblocker.

Because Brave didn't allow add-ons when I tried it. This was years ago so no idea what it's like now

Because old habits die hard.

Because Chrome stuffed up my task bar icons one time too many. (eg two Gmail icons, once for each account - randomly start working as bookmarks instead of their own window.) Fixing that takes many attempts

Firefox can't do this at all, but an extension fixed that.

I used to for many years and recently moved to Arc. It’s a totally different experience of browsing the internet and workspace management, however I’d like to go back to Firefox if it’s possible to tweak it as much as possible to Arc.

Idk really. At work I prefer chrome behaviour more. Also the spellcheck is better.
At home I prefer firefox more. Probably more because I like the addon feature like Dark reader and ublock on Firefox mobile.

It's by far the best mobile browser that let's you run tampermonkey and uBlock on Android and it's not close. I haven't found an add-on that let's me run video/audio in the background, so until then Brave stays installed so that running YouTube with no ads and the phone locked is an option.

Aside from that, Firefox gives fantastic customization options, runs well, and is less vulnerable to attacks specifically because it has a smaller market share and it makes more sense to target Chromium based browsers.

I actually stopped using it a few years ago because of a weird glitch I kept encountering where it would forget how to render non-standard symbols on websites (I forget the technical description, it's been years). Sites like Twitter became neigh unusable because I couldn't tell what any button was.

With all the recent problems, I know I want to switch back. Just haven't had the time and patience to do it.

When it first came it out it was slow slow slow. They've fixed that. Admittedly their search engine returns "sparse" results compared to google, but their security and commitment to privacy is worth the dearth of 'hits' to my more esoteric searches.

Writing Firefox extensions sucked.

I haven't tried web extensions.

Its not Google

My device doesn't have Firefox and doesn't have the option.

For the price of mild inconvenience in some cases I get to add a tiny little bit of resistance against chromium monopolistic rule.