First, this not a beta release. It's Firefox 1.1 final, unless you have installed the wrong file.

Second, I've been using Firefox as the default browser since the 1.0 release. I don't know where some people get the idea it's slower than MicroB or runs flash any differently. I'll admit I've tweaked FF a bit - increased cache memory, etc. but by seat-of-the-pants it's always run as well as MicroB for me. I haven't done any formal testing to speak of though.

MicroB seems to load quicker because it pre-loads into memory at boot, but after both get going I can't tell a significant speed difference. If anything, FF should be faster due to being based on the FF 3.6 engine while MicroB is based on the FF 3.5 engine.

I just prefer the FF UI and it handles some business websites I use better than MicroB.