Vlad
Low power mode is not the same as what the OP asked for..
I would also really like this. I have a lot of tabs open and sometimes there's one of them drawing a lot of CPU power even though I'm not using it. But in order to find which one I have to manually suspend each and every tab.
This is not the same as "Low power mode" since:
1: Low power mode does not hibernate pinned tabs.
2: Having to turn on and off "Low power mode" to suspend all my tabs seems not ideal.
Why not just have a menu option (and a keyboard shortcut ideally) to "Suspend all tabs"?