Just for correctness the Vivaldi feature I mentioned is called the tab hibernate one. Thank you teamhttps://help.vivaldi.com/desktop/tabs/tab-features/#Hibernating_Tabs
FWIW Vivaldi has a feature that allows exactly for this: IOW the link and the "static" page remains in your tab but as you "pause" it the browser engine frees all its memory.Somewhat unrelated but could be implemented in the same way, they also have ...
