I just remembered another downside to Mozilla.  Tabbed browsing doesn't go well with ZoneAlarm firewall.  The problem is that for each tab you open ZA gobbles up more RAM.  After you close the browser ZA doesn't release the memory and after awhile you have to reboot.  To be honest I found this on an earlier release of Mozilla, so maybe it is ok now though more likely it is actually a disadvantage of ZA.  I eventually uninstalled ZA.
Really ? I have the same problem ! <img src="/ubbthreads/images/graemlins/eek.gif" alt="" /> I thought it was a problem of Mozilla ! <img src="/ubbthreads/images/graemlins/eek.gif" alt="" />