Re: why do I stick with Firefox?
The Mozilla Foundation have always been the nice guys of the web, and I've used Firefox since the early 2000s (with fond memories of "Cookies are delicious delicacies" - in itself a hat-tip to Netscape).
I did have a spell where I moved to Chrome because everyone was telling me how much quicker and more efficient it was, but to be honest I noticed no difference whatsoever (benchmarks are rarely a true reflection of real-life usage scenarios) so moved back within a few weeks.
Call me paranoid if you like, but I'd rather use an independent browser than one run by a monolithic corporation such as Google, Microsoft or Apple, each of which have their own longer-term agendas.
The very fact we have such a choice is the important thing, and long may that choice continue to exist. away from the dark early days of the web with the massively dominant IE5/6 market share.