I use Opera. Rarely I use Firefox, but that's only when some bastard site tells me browser not supported. I like Opera for the speed-dial. It's really good, as I only visit daily a couple of sites, ussually the same 2 (this and a 3d forum). I like the tabs and the transfer tab which is always the first tab from the left. Don't use any plugins except FLVDownloader, and I use that very rarely. I switched from Firefox, as it seemed too slugish in loading sites and such. I used for a short period of time SeaMonkey on Linux. It was ok. I prefer using IE in net-caffes as I'm positive it WILL infect the PC. And since it's not mine, I rather enjoy ruining it. One of the few errors I had with Opera was with JS because I was using a public beta.
PS: You also forgot Netscape, but it sucks imo as it doesn't support a lot of sites.
PS: You also forgot Netscape, but it sucks imo as it doesn't support a lot of sites.