Excellent add-on. Does exactly what is says and very very well.
It seriously can cut down on memory usage in seconds. Really helpful!
Props to the developer!

This should be stock.

+1

This is a great extension that does its job well - keep open tabs out of memory after a period of time. It behaves so well that sometimes I'm frustrated by not being able to search thru my "discarded" open tabs to find a tab for resurrection.

Does anyone have suggestions on how to search for all tabs that are open, regardless if "discarded" or not in Firefox?

In Chrome you can use `chrome://inspect/#pages` to list all the tabs that are opened. I can't find similar function in Firefox for that.