On desktop because of multi account containers On Android I use Vivaldi

Because brain.

Because I used the old mozilla browser back in the 90s and when it switched to calling firefox I kept on using it.

I'm not sure if using Librewolf on desktop or Mull on mobile counts but they are pretty good hardened forks of Firefox.

Firefox is great but the downside is that it isn't as private as browsers I've mentioned by default. Still, it is solid choice from privacy perspective.

My FFFL Tatoo is gonna be so rad.

Extension support/customization.

I used Firefox on the desktop since it was called Firebird. I could mix and match and mush all sorts of crazy things into it over the years. I was very happy with it.

Then Australis (sp?) changed everything on the desktop and broke all my extensions. Some still worked, but since the goal was "be Chrome" I just switched to that.

On mobile it was a similar experience. I could add all sorts of extensions and then one day I just couldn't. All the browsers were basically the same so I switched to Chrome.

One day Chrome added the ability to have the URL bar on the bottom and I was so pleased. Then one day they took it away. I looked online how to get it back and discovered Firefox could do it. Then I learned that as long as I used Firefox Nightly I could install extensions. (I think you can do this in stable now?) Then I learned about a handful of other useful customizations.

I use Firefox mainly. I use Chrome sometimes if I'm testing something, mostly to test "Did I fuck up with my constant customization in Firefox or is this website just stupid?"

I use Firefox because it (generally) let's me decide how it should work.

Because Pale Moon became a dumpster fire.

I use Firefox because I really like the containers extension that makes sure each tab is its own environment to prevent cross contamination of cookies etc. Also, I can rest assured that ublock origin is working as intended by the author since it is primarily targeted toward Firefox these days I think.

Sadly I had to stop using Firefox on my gaming Windows box because for whatever reason my Firefox install seems to gobble up all of my GPU memory. It's working fine on Mac and Linux though.

Because the only thing it doesn't have that I miss from edge is the vertical tabs, otherwise its just better in every way that matter to me.

And before someone mentions it, I am aware there are vertical tab options, but none of them are the close enough.

I'm happy with Brave for the most part but an update with Webview or something broke all browsers using it on my Android Dash unit so I was actually forced to switch to Firefox simply because it works. Now I'm considering switching over on all my devices.

Years ago it was the only customizable browser, that's why I started using it. Today it still is the most customizable one, even though other browsers started supporting add-ons and themes too.

Honestly I'm just used to it. Using it now for probably about two decades.

I was a big Netscape fan and when Firefox came out, I adopted it pretty soon. Never left it as I never quite get the hang of Chrome.

Guess.

Tree Style Tab

And lack of (what I would consider) a good alternatives.

I use Firefox when I suspect a site isn't working well with Librewolf. This also implies the site didn't work for Qutebrowser previously

It was my first browser so I stuck with it. I tried other browsers over the years, but I am used to firefox stuff, and ublock works better there.

Honestly, even though I want to say it's for security or something, I use Firefox because of habit. Ive used it ever since I got my first PC over a decade ago and don't remember the reason I switched in the first place.

Like the logo and it works as well as the alternatives

Originally (more than a decennia ago) because it had better customizability, later because it was less memory hungry.

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.

I somehow just always followed since Netscape Navigator.

Much more flexibility in the way of custom themesz extensions and i think its called custom js or something its been a while but arkenfox is an example of one and I love all the different forks which while I'm not gonna use I'm happy that exists. Hate it on android like though I use cromite (bromite fork)