I use waterfox, a 64-bit variant of firefox a lot. While I'm gaming with a web browser open, I tend to switch over to Chrome. Firefox and waterfox use a lot of memory, so I prefer to use Chrome on occasion so my PC runs a bit faster.
I used to use Firefox, moved onto Chrome, it starts up and seems just as fast, the adblock isn't quick enough to stop some pop ups before I see them, unlike the Firefox version of adblock. But I'm not too picky.
Firefox, chrome, this random one I designed for this platform called ASDFQWERTYWEB BRWSUR. It's really fast, loads up a 100000kb page in like -3 seconds.