1. Mozilla's goals for the web line up quite nicely with my own.
2. The performance is good for what I want.
3. The extension API is more powerful than Chrome's.
4. Outside of the Apple ecosystem, it's the last major alternative to the Chrome skins.
5. It isn't actively trying to cripple adblockers.

Is not chromium, has a good UI, supports manifest v2, is open source and have native support for autoscrolling on linux

It's not Chrome or Chromium derived. Google has incentives to mine me for data. Mozilla, not so much. I don't trust Mozilla completely, but I certainly trust them more than Google to have my best interest at heart.

There are other reasons, but if I had to point only one word: containers.

Switched to Chrome a few years back when Firefox killed XUL and bundled too much bloatware.

Now I've switched back to Firefox because it's good again and Google is doing too many evil things lately (Web Integrity).

Because it has tabs. Seriously, I first used Firefox back when IE6 was the norm, and Firefox brought tabs and better standard compliance. Haven't turned my back since.

Supports extensions on mobile

The mobile version has addons like ublock-origin and bottom search bar. Plus, Chrome wants you to enjoy the web, which is full of ads. I don't, that's why.

1. It's faster
2. It's not chromium-based
3. It can protect you from trackers and block ads
4. Chrome may terminates Adblock-functionality extensions in Manifest V3 and Firefox wouldn't, afaik

Because it is fucking awesome.

Plus on mobile, I likes my ublock, dark reader, etc.

Container tabs. No more need for separate chrome profiles.

It's got a cool fox logo

I have been with Firefox, since it's inception. Never left it. And it never let me down.

Because I like having RAM to spare

Because I hate ads.

Ad blocking on desktop and mobile is awesome.

And it's vital to have multiple browser engines in the wild for interoperability. If we go all Chromium-based, we're going to eventually pay for that like IE6.

And Google is kind of an untrustworthy POS of a company these days.

On Android it's the only reasonable choice so no question there.

On desktop I used Netscape/Phoenix/Firebird/Firefox/Conkeror for many years but switched to Chromium when I had to start over after the XUL-apocalypse. But lately I've been maintaining my Firefox setup more or less in parallel with Chromium and this week as it happens I am trying to make the switch back again. Mostly just to wean off the Google stuff. Will see how it goes.

Another (less-critical) motivation is that Chromium takes over 10 hours to build on my machine. Firefox is under 1 and it gets done way faster even if an LLVM or Rust build is involved too.

One browser ruled by google is not good for anyone.

Simple, it is from an org that has been FOSS and user focused for decades. Compare that to a bunch of companies which have more or less been doing the opposite. As far as I am concerned, people are just nuts for using anything else. But people are free to do what they want.

To get away from Google. Mozilla seems alright in the grand scheme of things.

Just a small counterweight to everything being chromium. I’m still having trouble with them not having passkeys yet but I know the feature is coming.

I don't want to sign in to my browser, simple as that. I tried Firefox maybe 5 years ago and I simply liked it better.

Chrome's manifest V3 announcement means I'm sticking with Firefox.

Because it has a built in adblocker on mobile and with the news that Chromium itself is going to be doing shit to stop adblockers, I don't want a chromium based browser period. Only reason I ever switched from Firefox in the first place was that, at the time, it was getting slower and Chrome was the new, fast, hotness in town.

Tree-style tabs and customizability. Better Android UI and privacy.

Because I feel shamed every time I check privacytools.io if I don't.

/s it's great but I need a chromium backup. Brave is the best chromium clone I know.

Btw, if y'all want to download pure firefox, check this, there's a better official download link with less tracking. In any case, I use weakened librewolf with Medium Ublock blocking (block all 3rd party scripts and frames and enable scripts only for logged sites since they are tracking me through other means anyway)

I switched recently as my first baby steps to degoogle, particularly when I saw the writing on the wall with WEI. I was very pleasantly surprised by how customizable it is using XUL.

I like the fox theme

I don't, tbh. I did, for 15 years, because it was the most customizable and feature-rich browser on the market, but when they killed XUL support all my important shit broke, 15 years of customizations and getting things just how I wanted them, and instead of spending that again I migrated to Vivaldi essentially out of spite.

Because before Firefox I used Netscape. It's had its ups and downs but it's never been bad to me to the point of considering moving to anything else. So a combo of legacy and that it works.

Chrome lost its way years ago. I value not seeing ads or getting personalized content more than I value 99% of the chrome features.

Since Firefox finally fixed that weird memory fragmentation issue, it's been pretty smooth sailing for me. Inspector & Debugger could use a few performance patches though.

Because Chrome just stopped working on my PC one day like a decade ago.

Loaded question much

I generally stick with Firefox, but I do have chromite ony degoogled secondary phone as a backup in case something only works with chromium renderer.

99 percent of the time, it works 100 percent of the time

I don't, I moved to Chrome after a year of using Firefox full time.

I don't. Brave's adblock works better for the things I use most.

My work software kept seeing weird bugs in Chrome, so I switched permanently.