[Bug 66350] Re: Firefox uses high CPU for extended periods of time when spawning a new window with many tabs already open

[Ryan Paul]

I can confirm this too. When I have many tabs open and I open a new
window, processor consumption steadily climbs until it reaches 100% and
then Firefox becomes completely unresponsive and I have to terminate it.
The problem persisted even with a fresh profile. This started happening
after the last Firefox security update. I have started using Firefox
from an official mozilla.org tarball, and it doesn't seem to have the
same problem.

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Firefox uses high CPU for extended periods of time when spawning a new window with many tabs already open
https://bugs.launchpad.net/bugs/66350
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