When it comes to my browsers I'm very particular about what I use and why, and sometimes it all comes down to a single function that's the ultimate decider on which I go with; I'll talk about that in a moment.
Chromium/Chrome for a while now has been giving me issues with certain things that just don't work correctly all the time. Some forms bug out, images sometimes won't load from time to time, etc. There wasn't any major problem with the browser; it was the little things that annoyed me. The annoyances mounted up to the point where I just ditched it completely.
After uninstalling I had decide whether to muddle along with IE or Firefox. I downloaded IE 9 RC. Hated it, and not available on the netbook since that runs XP. Opera is even worse concerning buggy problems than Chrome is, so I didn't bother with that mess.
I decided to go with Fx 3.6, but it's old clunky nature started annoying me. That and I knew that Xmarks BYOS wasn't available for it (allows you to use your own FTP for bookmark sync).
I installed Fx Beta 11, and three extensions that I use, LogMeIn, ScreenGrab and Xmarks BYOS didn't work. But then I found out that the latest Xmarks does allow you to use your own FTP server for sync (they had removed the feature but put it back in) and an alternative to ScreenGrab, Screenshot Pimp, captures 'complete page' easily. As for LogMeIn, there isn't an official plugin by that company yet that supports Fx 4, but that's okay because I can use IE 8 for that.
It was Xmarks' ability to use my own FTP serv that convinced me to make the switchover to Fx 4. That was an absolutely mandatory thing that had to work. It does, so I switched.
I have Fx 4 installed on both my desktop and netbook. On the netbook in particular it runs really nicely and much faster than Fx 3.6 did. Not as fast as Chrome, but I'll take the slightly slower operation knowing that all web sites I go to will, y'know, work like they're supposed to.
I don't hate Fx 4 anymore
Fx is finally at a point where version 4 is stable, usable and works like it's supposed to. The last time I seriously tried it was beta 4 and it was frickin' awful. 7 betas later has shown huge improvements just about everywhere, so... yeah. Fx is now my primary browser. Again.