Iceweasel 10 eats 100% CPU

[Émeric Maschino <emeric.maschino@gmail.com>]

Gang,

I don't know if you tried latest Iceweasel 10 currently in Testing,
but it randomly freezes, eating 100% CPU. For example, while reading
emails, GMail suddenly stops working. I initially thought that
Iceweasel crashed, but GDB didn't agree with me. top by contrast
reports a huge CPU activity. This is not limited to GMail: it randomly
appear with all visited websites, within seconds or a minute.

Does anybody experience the same issue here? I'm wondering if this can
caused by some GPU acceleration. Does Iceweasel 10 relies, at least
partly, on the GPU now? Iceweasel 9 was running fine.

Regards,

     Emeric