Can you find a copy of the kernel panic in /var/log/kern.log?
If so, please attach it to this bug.
See https://wiki.ubuntu.com/DebuggingSystemCrash
** Changed in: Ubuntu
Sourcepackagename: None => linux-source-2.6.15
Status: Unconfirmed => Needs Info
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Kernel panic browsing with firefox
https://launchpad.net/bugs/46829