I've become a big fan of "The Great Suspender" extension since I am always opening new tabs in the background and may not get around to them until hours -- or sometimes days! -- later.

On Chrome I presume? Not available on FF, and afaik FF doesn't even support unloading tabs (actually unloading from memory rather than making it appear that way but still consuming the memory).

Ahhh, yes, on Chrome, sorry. I didn't realize it wasn't also available for FF.