Which browser is your default, and why?

Firefox. When I first got to use a Computer to surf the internet I remember using Firefox and that is what I have used ever since.

A lot of people here have said that Firefox was a slow and bloated mess pre-Quantum. I suppose I stuck to Firefox when most people shifted over to Chome because my internet connection had been slow enough that internet was unusable without javascript and images disabled (this is no viable as a significant proportion of websites don't work without JS). Hence my browser ran pretty light and never gave me any issues.

At work for development I now use Chrome (for devtools) as Firefox still chokes up on really large javascript files. For anything else Firefox remains my default as it is comparable to chrome now in terms of performance (this only means I haven't noticed any noticeable difference for my web browsing workloads) and has a lot of features that I like (containers, customisability,...).

edit: The above refers to my choice of browser on Desktop.

I use Brave, previously was a Chrome and Opera (but never again after I learned what the f is going on there).

I love that it has the chrome ecosystem but with better built in privacy and some other extra features I wanted (right click and block element). Everything works, sometimes sites break due to script blocking but that's a click away to fix.

For Windows, I prefer portable first, I don't want some auto running background services from Google/Mozilla. So I chosen IronPortable & Firefox Development Portable. For Linux, I sticked with default Firefox from OS repository. For mobile, I highly recommend Kiwi Browser - the one of very few Chromium base which let you install Chrome extension like Ublock.

Firefox. It doesn't feel like it's actively working against my interests, unlike Chrome and Safari.

Using GNU/Linux on all my computers at work and home and I have Firefox as my default one. I trust it the most when it comes to protecting my privacy and having an open/democratic governance of the project.

Firefox.

Because Mozilla is actively (and publicly) committed to privacy, which is the opposite intention of Google (Chrome) and Microsoft (IE/Edge/Whatever).

At home I'm using Vivaldi as my main browser. As a heavy YouTube user Firefox isn't a option for me, it crashes frequently and the performance is inferior than Chrome (I think it's not their fault, but it turns it unusable anyway).

Vivaldi has the benefits of Chrome for Google sites, is much more customizable than Chrome and it has some nice features that those who used Opera 12 in the past would feel happy about, like tab stacking, tree view and my favorite: mouse gestures. All baked in the browser without the need of buggy extensions.

I wish I could be back to Firefox and support the work they are doing regarding privacy, and I'll keep testing every release to see if there are any improvements to performance.

Safari because it integrates with all my Apple devices and it's much more battery/memory efficient than Chrome.

The reader mode is fantastic and the password autofill/keychain works great on all my devices too.

Firefox without interruption since 2004/2005 sometime. I almost switched due to how slow FF had gotten compared to Chrome. Improvements FF have made more recently have kept me very happy as a user. On mobile I use Chrome.

I dislike FF's increasing sprawl / bloat. I suppose a browser with <1% device market share has to survive somehow. I dislike how they instigate opted-in spyware from first install now ("Firefox Data Collection"). I like how text renders on FF versus Chrome, their engine produces a superior aesthetic.

Firefox for day to day activities and work, but when I have to use websites that are only available in their native languages I use chrome for the translation capabilities.

Pale Moon at the office for anything even vaguely non-work related (i.e. anything I'd browse on my lunch break, etc.). Google Chrome for all official work stuff. At home, Vivaldi on Linux for absolutely everything.

Even with that strict separation, the cross-over of adverts from home to work is astonishing. There are things I search for at home that I absolutely don't want showing up on my corporate browser.

I use Safari for all financial services, Chrome for Google stuff, newspapers, and some other sites I’m fine with being logged into and tracked, and Firefox for routine web browsing (like hn). Firefox is set to purge all cookies and offline data on closing. Chrome is set to purge offline data if I “log out” of Chrome. I use Vivaldi occasionally for questionable sites.

Firefox. I am using it since 2008. Once I tried to switch to chrome, but memory and other issues were there. The initial reason I used firefox was for firebug,Chrome was not even launched at that time. I have now a soft spot for Firefox, But on mobile I use Chrome, firefox lite is looking impressive but I will wait to get it matured.

Firefox, because it starts up fast, allows me to customize it to fit my system color scheme, and lets me set up autohide for the toolbar. I open and close my browser constantly so startup time is more important than how fast it is when running. Also chrome doesn't fit with my theme and has a big address bar so it looks ugly.

Chrome on Mac, it's convenient, and despite robbing all the RAM my 2015 MBP has to offer, it works well.

I tried switching to FireFox for two weeks, but found a lot of visual tearing/glitches, and it didn't have pinch to zoom which I use on Chrome constantly.

Safari because the integration with iCloud Keychain, Apple Pay, and its ability to show videos "Picture in Picture" in the Mac from sites such as YouTube. At work I use also Safari, but 40% of the time I use Chrome because the Safari dev tools are kind of limited IMHO

At Home (Windows), use Firefox browser with add-ons for ad blocking, media control etc

At Work (Windows), use Chrome. Like their dev-tools for debugging purposes.

On Mobile, I use default Samsung browser on Note 8. I believe browser is lightweight and fast with ad blocking feature.

Chrome for work because i like the dev-tools and most of our users are on it either way.

FireFox for everything personal because its fast and i love the containers.

On Android I also use Firefox because I like having extensions to block ads and get youtube to play videos while the screen is locked.

Firefox so I can keep my mobile and desktop experience the same and keep away from the big G

Used to use Chrome, now I use Brave for home & mobile browsing. At work I'm locked into "approved" browsers so I'm using Chrome. The only alternatives are IE/Edge.

Google chrome. At the end of the day, this is the most convenient one for me

Firefox. If not for some stupid corporate policies, I would use it at work too. Tried Vivaldi cuz the cool kids were using it but didn't get around to explore all its features.

Firefox for everything but development.

I actually run both simultaneously and it's handy because I know docs/notes/confluence will be in the FF windows and dev stuff in Chrome's

Finally uninstalled Chrome after X amount of years after using Brave successfully for a year. Kept Firefox around just in case. :)

Firefox by far. Besides being a browser that doesn't spy on you, it is light on resources, fast, and has tab sending to all my devices.

Chromium. Does everything I need it to. No reason to switch. Also Firefox DoH plan concerns me

Firefox because privacy. Also container tabs to keep multiple accounts open on the same site, etc.

Google chrome

Safari for everything personal, Chrome for work-related and Firefox for banks.

at home:

    MacOS X: firefox developer edition
    Linux: firefox

( basically for privacy concerns )

at work:

   MacOS X: chrome/safari

( chrome/safari are the target platforms for our SPA on mobile )

Chrome, because nobody bothers to do cross browser testing :(

FireFox at home, the new Edge for work/development.