I've also noticed that sometimes on resuming, Firefox doesn't freeze,
but it does use 100% CPU. When this happens, I think, but am not
sure, that it correlates with having Gmail and/or Google Reader open
in a tab in Firefox. I think that a few times, closing those tabs has
cut the CPU usage back to normal, after which I could reopen them and
it was fine. *shrug*
I've also noticed that sometimes on resuming, Firefox doesn't freeze,
but it does use 100% CPU. When this happens, I think, but am not
sure, that it correlates with having Gmail and/or Google Reader open
in a tab in Firefox. I think that a few times, closing those tabs has
cut the CPU usage back to normal, after which I could reopen them and
it was fine. *shrug*