For me, browsers are like cakes, I like to try them all (I would like to type women, but I don't get to try each one I like
)
I use all the major ones plus Konqueror on Linux, except maybe Android stock browser, but not all in the same time, usually I change the browser when I install new computers to see how far they got since the last time I used the,
I am not a developer so for me it is all about the look and usability. They all have their strong sides:
Chrome - works best with Google apps and has most extensions
Opera - best interface, good functions
Explorer - every cms and online banking works on it
Firefox - clear interface, rock solid
My website looks a little bit different in different browsers, but all the elements are visible in each one of them, although some elements are a bit moved left or right