It's my own GECKO powered compilation of old FF and new FF + some more custom stuff. It has no name, well not official because only I use it. Now if we talk about all the mass crap then we have problematic matter. FF was good once in the old 2.0 times the new FF is ugly, buggy and overloaded with Google stuff (all can be stripped though if you are willing to make your own build, it is open source so you are allowed to do what you want with it except using Mozilla trademarks) FF is supported by many useful plugins written by some great programmers too.
As for what should interest webmasters the most which has the most up to date support for the new HTML5 and CSS3 goodness. FF4 and newer Aurora, Nightly etc., right after newest FF I would place Chromium family (Iron, Chrome or Pure chromium binaries). I've checked it. Opera, SeaMonkey and other are behind and too fucking bad because if not that and that Opera's (Spy)Googleware Opera would be quite nice browser.
Internet explorer - Hell no, maybe 6.0 when run on WinXP, it's hard to get anything faster but I wouldn't browse with it anything that is not mine or that I don't know well. Obviously that would be dangerous. 7, 8, 9, and everything newer is and it will suck.
Safari - Please...
Rockmelt - Never tried and somehow I don't feel such need.
Palemoon4 - it's simply FF4 but with old cpu support cut off.
Mosaic - Mmmm sweet memories...
So getting to the point, you should make your own build of FF, throw away useless shit along with Google spyware and add what you like and need. If you can't then I have bad news for you, you are doomed.
Btw if you are on linux then IceCat is a bit nicer than FF.
I was wondering once if I should keep my browser only for my self or to give it a way for ppl along with some nice gui and cool name but the thing is that I have no time to answer ppl questions, provide support, update frequently and so on.
Do you know what pisses me off the most in all browsers? That every one renders a websites its own way. My head hurts when I try to satisfy them all.
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