Firefox crashes

Hi, just a quick note. I'm using firefox 3.5.9, on xp sp2, 32bit. I encountered occasional crashes, that was really annoying. So I tracked down which extension could do this. So first type of crashes was on google searches, this was caused by xmarks, especially the siteinfo feature. If this was turned off, it didn't crash. Second type of crash was with particular sites, like linkedin.com, this was caused by AVG safe search. I hope this helps for someone.