Firefox causes PC to freeze/lockup

[hardtoneselector]

Binary package hint: firefox-3.0

Sometimes my PC freezes totally, only the mousepointer is moving, strg+alt+backspace aint working (it's enabled!).
The freeze only happens if I got Firefox open. On normal pages Firefox works fine so far, but for some reasons always at the same webpages the freeze happens. Most of the times it happens by playing the Ajax based browsergame travianer.de(reproduceable in an undefined time) it happend lately at support.zikula.de.
I assume this is caused by Java or Javascript Code.

I can not narrow it down further.
And I did not found an matching error report.

ProblemType: Bug
Architecture: i386
DistroRelease: Ubuntu 9.04
Package: firefox-3.0 3.0.8+nobinonly-0ubuntu3
ProcEnviron:
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: firefox-3.0
Uname: Linux 2.6.28-11-generic i686

[Sebastian (guttenb)]

Same happens to me since recently. So far just two times but within one week and within firefox. I also cannot reproduce it so far, don't even know which website might have been responsible and if it was really firefox' fault. My versions:

Ubuntu 9.10
Gnome 2.28.1
firefox 3.5.9

[Wayno (ichabod)]

Ditto. Firefox 64 bit worked fine in 10.04, but creates lockup issues in Ubuntu 10.10.

Neither Chrome of Opera have these issues. Doesn't appear flash or java related.

Wayno