I closed down all 5 or 6 of my SatGuy tabs.
Still had the high base-line CPU usage.
Tracked it to an open tab to the Galaxy-Marketing site, which had come back up to their front page.
They now have a large spinning globe at the bottom, and it was using tremendous CPU to animate it.
After closing down that tab, we got back to where we could see the little CPU bursts again.
They coincide with -this- page running off to the above-mentioned web sites.
At this time, none of my other open SatGuy tabs seem to be doing the nasty.
Will keep an eye on the situation.
Thanks for your efforts.
edit:
Okay, now as I use the other two SatGuy tabs to browse into threads, they've started auto-executing.
For some reason, this tab (now on a 2nd page) isn't any more.
Guess it depends on what you are serving up on a particular page of the forum.
observation:
This problem has been with me for a long time.
I have grass growing in my CPU usage graph.
I knew it was something. Just hated to try to track it down.
Recently, there was a new clue (SatGuy site change or Firefox change), resulting in the tab icon animating all by itself.
That drew my attention back to the old problem.
Closing down all the SatGuy tabs, as I did above, showed me this grass (cpu spikes) that I've had for months (or more) is all due to something executing on the SatGuys forum.
So, what's actually new, is that it was easier to detect.