It’s a huge improvement over Mosaic.

I switched from Netscape Navigator to Firefox and have used it since. Have tried other browsers but they can't compete.

Because chrome eats my PCs resources like I eat shredded cheese out of the bag at 3am

fast, no web environment integrity, not run by a tech giant, no anticonsumer changes, NO CHROMIUM, goog wayland support

The tree-style tabs extension

Container tabs and built in tracking protection by default. Mozilla is not Google, unfortunately they depend on their money to survive. Fuck Google.

I initially switched because I felt like it had better support for linux and specifically wayland. Then stayed for other features that are mostly mentioned in other comments.

Principle.

inherent distrust of google, which is deeply pervasive

Not Chromium, has custom CSS for the GUI, is open source software and it has a nice extension library

Also it's also a pretty good browser (right now I'm technically not using Firefox, but rather Librewolf, but still based on Firefox)

Because I need to browse the web.

To counter a monopoly

I use firefox because Lemmy told me to.

It is the only one that can hold my hundreds of tabs. It's also ooensource, but that's a bonus. Recently addblocker is a very good feature too.

I am slowly switching back to Firefox since Google are nerfing ad blockers in Chromium. I'm switching to DuckDuckGo since their search results have become almost unusably bad recently. Unfortunately though, there it's no usuable replacements for the rest of the Google ecosystem as far as my use case is concerned. I'd even ditch Android if there were a reasonable alternative.

Desktop: Google done fucked up. I didnt use FF cause of one of my extensions but I opted out when they started talking about the DRM for webpages.
Mobile: Its just better with Adblock.

I think foxes are cool :)

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

Its good enough now and mobile addons exist, plus fuck chrome

I started out with using it on the mobile, due to the add-ons being suported, but then Google starten messing around with chrome, announcing changes to the plugin api that would neuter Adblockers and now, the DRM for the web thingy, and I thought enough is enough.

Firefox still has its issues and Chrome does feel more polished, but I'm going with the good guys on this one.

Icecat takes too long to compile

Tree style tabs in what made me switch to Firefox.

I like that it's not Chrome, and that it's so modifiable.

Also, Edge was using over 2 GB of RAM on my work computer with only one tab open.

Because internet explorer 6 sucked and it has the best ad blocker selection

Doing my bit to support the open web. Plus, while it's probably just familiarity, I've always felt that Firefox works with me while Chrome works against me.

Because Chrome kept crashing my GPU driver, and Firefox doesn't.

And I used Chrome in the first place because Firefox let malware onto my Windows XP PC. Chrome updated add-ons automatically at that time, and Firefox didn't (not extensions, we're talking things like Macromedia Flash, Shockwave and Java Applets that are long dead now).

Works good at browser

Because I need a browser.

Because I can.

good privacy

I like that LibreWolf automatically clears history upon closing.

Many reasons, but the main one is being able to self-host the sync server. It's just crazy that the entire browsing history of most people on the internet is stored on Google servers, with no e2e encryption!