Mozilla 3.0.0.3 crash when working with habrahabr

But with such an error, I often get the browser when working with Habr. Most often happens when clicking on a link to a profile (username.habrahabr.ru/).
When working with other sites like this has never been noticed.
I get similar on the current version 3.0.0.3, but it was the same on the two.
The periodicity is strange - sometimes several times a day, then every week all is quiet.
Installed plugins:
AdBlock, BBCodeExtra, CSS \ HTML validator, firebug, firecookie, fireshot, flashgot, FoxyTunes, ScrapBook, Stylish and a couple of others. I've been using everyone for a long time, I don’t install new ones, I don’t break the system, so I accept the option with conflicts of plug-ins and Habr, but it’s very abstract.
Questions:
1 - someone came across a similar (in the discussion Habr did not find)
2 - how can you trace the cause?
3 - and most importantly - how to fight?
Thanks in advance for the options