Firefox. Waiting for a new browser from Mozilla based on Servo engine.

Been enjoying Chrome.

GAAAAAAAAAAAAAAAAH

Firefox but with an addon for the old design, the new one was freaking me out :D
And since IE is so interwined with windows it is also still on my computer, but I only use it, if I need to check if some website problem is appearing because of Firefox :D

TL;DR => Firefox

Longer version:

I used to like Opera because it was lean and mean, and wouldn't constantly get cluttered with unwanted search bars and plug-ins like Firefox (and IE). At some point they apparently removed the menu bar completely, and I just find it less intuitive than before, so not using it that much anymore (I didn't find a way to enable the menus anymore in the very latest versions, apparently the menu bar is gone for good).

I think the forced changes were to make Opera more touch-friendly, same problem to a desktop user like me as with the introduction of the Windows 8 Metro view. I dislike having an access to the menu options only through one hub button, and some of the configuration screens just irritate me. E.g. when I select the option to remove cached offline data, it has to bring this completely separate page, from which I need to do it.

One good thing about Opera though, even if I don't have much use for it: its Turbo Mode seems to be a handy way to bypass any ISP issued firewall filters or blacklists, as it automatically reroutes all data through Opera servers, I gather. Yep, even PBay is accessible with it from Finland (the Finnish ISPs are forced to try to prevent people from accessing any PBay servers).

IE, I don't use it that much (except at my work, where I'm stuck to IE8 for some reason, in Windows 7; fortunately I have also Firefox on the side). I don't like how the latest IE versions are usually restricted only to the latest Windows version(s). Firefox and Opera latest versions are also available for older Windows versions... and Linux! Also in the past, IE used to be the slowest one to adopt new functionalities that were already found for a long time in other browsers.

Chrome... I just don't fully trust Google. Maybe there are some unofficial Chrome versions that don't have Google spyware embedded, but I see no real reason to even look at Chrome anymore, e.g. due to Firefox.

I use Firefox currently most of the time, both in Windows and Linux, and Android! The main thing I like about it that it is one of the few, if not the only, browser that can automatically remove all cached data, history, cookies etc. when you exit the browser (without having to use any separate "private mode"). Now even the mobile version has that functionality.

One more browser I decided to try for the heck of it: TOR Browser (privacy, yay!). But it doesn't seem to work without fiddling from e.g. my workplace, so I guess it is less useful to me for now.

Chrome is my main. I like the simplicity of the interface, and the bookmark/account synching across all devices is very convenient. The developer tools are also quite handy.

Firefox is my secondary, and primarily used for its ease of blocking any scripts if I need to visit untrusted sites.

IE I keep on my machine for site compatibility reasons. Some sites and software are still somehow dependent on using IE to access things... particularly in Japan.

Pale Moon.

Love Firefox mechanics; Hate Firefox aesthetics.

LOngtime Opera user up til and including 12.x. Customizable. Fast. Low footprint.
Unfortunately the powers that be decided to switch rendering engines :/. Been shit since. Sorry. But thats true.

Trying Palemoon and Slimbrowser (i will use chrome if i have to but firefox is still a bloated piece of crap..has been since 3.x )....

Some years ago I got fed up with Firefox updating every three bloody seconds - they went from version four to sixteen or twenty-six in about six hours, it seemed - so now I'm using SRWare Iron (Chromium-based but without the suspicious Google connections, plus more pleasing to my eye than Comodo Dragon) on one computer and Pale Moon on the other (which updates quite frequently still, so I'll probably get rid of that at some point).

Been using Firefox since its inception. Now it's even better with the extensions.

I use Pale Moon as my main browser, with regular Firefox as my backup and Comodo Dragon as a secondary backup. I also use SRWare Iron as a backup on another computer.

Terve. I don't know what they did to Opera, but I used to love it so much. It's still the only one that behaves exactly the way I want it to, but the performance is just atrocious.

Chromium is basically Chrome before Google put all its dirty shit in it. It seems alright so far, except that you can't add your sites to the speed dial like Opera.

Firefox, the only decent customizable browser.

"Happy" Chrome user here. Firefox was alright but slower to my liking.. IE is still useful for separate tabs.

I prefer Firefox when using Windows, and Chrome when using Linux (Linux Firefox looks weird). Chrome on Windows when I'm forced to use flash... because flash always seems to fail in Firefox.