Regarding IE, I am so glad I don't run windowze in a daily basis, I don't care what they do. It is even banned at my uni (but the default is netscape, yuck, gone are the times of ns 3 and 4).
I have FF 1.5 at the uni, and sometimes crashes especially after one week of continuous use, as I don't quit.
the default in SuSe 9.3 is 1.0.6 or 7 and that crashes quite often, in a couple of hs.
But, I use the same profile for both.
The real problem is that java doesn't work anymore since i put 1.5, why ?, didn't found out yet (neither with 1.4.2 nor 1.5.0_6)...
And I'm using the same profile I had when I first installed it 1 1/2 years ago. No trashes, nothing.
The only extension I have is adblock, cannot live without it !