It doesn't work. It did when I first started using it, and even then it gave no indication of whether or not a tab was loaded. The problem has persisted through the last update, too, so I'm not sure what's going on.

Works as described and saves RAM.

Please add the ability to whitelist / exempt domains from auto-unload (for example to always keep gmail loaded).

Work like a charm! Finaly there is one that work with ff 58. You save my day man. By the way could you can make a keyboard shortcut or a button to unload tab. Expect on next release. Thanks and regards.