Used Firefox from when it was Firebird
I have used Firefox from the very beginning, and still use it. I am a bit annoyed by the way it has influences from Chrome, but at least, I know that by using the Alt key, I can get the normal menu up. One thing that really annoys me whenever I use a different browser on someone else's computer, is when using Youtube, there are adverts. That always surprises me!
Their mobile browser however needs to be severely optimised. It is rather slow though, it is the slowest thing on my Android mobile :( , it does mean that I don't need to bother with Facebook apps. :)