Hi, I just discovered a "new" firefox feature. I have a low power tiny computer which I use as server and to display videos. It often runs a firefox window with maybe five tabs, each on one youtube link that I follow, so to easily watch the next video in the series when I am on the mood. Problem: each tab eats a significant amount of CPU power. Solution: open a tab with "about:unloads" and click the "unload" button several times, to unload from memory the tabs using most resources. The computer went to maybe 5% instead of 25% cpu. Tabs that are "unloaded" by this are actually unloaded, they are blanked. So no cpu, and no ram. I assume that clicking on a tab awakes it again. Not tried yet. Yes, it does. But you have to click reload on "about:unloads" so that the awakened tab is listed again in the tab running the list And the reloaded tab remembers it was in mid-play, I mean, remembers the position. On my main computer releasing memory is not important. What interests me is freezing the cpu usage of tabs. Do you know something for that? Previously I tried this addon: https://addons.mozilla.org/en-US/firefox/addon/play-or-pause-tab-menu-item/ Doesn't quite work, it just pauses the play, but the tab still eats cpu. -- Cheers / Saludos, Carlos E. R. (from Telcontar, using openSUSE Leap 15.5)