I like to keep a few tabs open to webpages I want to revisit or read later. So it is not uncommon for me to have 1 or two active pages I'm looking at, and 20 dormant pages I won't be looking at for a few days. Since the last upgrade, the plugin-container is taking a lot of CPU time. (it might have been the firefox process before the upgrade, but it was less noticeable). From the help for "plugin-container" I see that adobe flash is the only currently supported plugin. So, can I pause the flash on my inactive pages so that I can save some CPU time (and energy). == This happened == Every time Firefox opened == I upgraded.