Ah. Maybe it could be the forecastfox. I have that and NoScript. The high load happens pretty much every time. I've disabled it and see what happens today.
I usually have one main window and then a window for downloads. I usually have a few tabs open, between 5 and 15 most of the time, though it can drop to 2 or 3 and briefly peak at 40 or so. As far a I can tell, CPU usage isn't affected by the number of tabs so much as how long FF has been running. After a certain time, it goes from less than 1% of the CPU usage to 90% - 94% -- firefox using over 90% of CPU https://launchpad.net/bugs/78786 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
