Will rate 5 stars after the bug will be fixed. It works as expected when using on an existing firefox session, but when the firefox starts and reloads the previous session, or when I load a sesion from the session manager, ALOT of tabs don't get loaded. I've spent several hours to find out that this problem happens because of this extension. It seems like it should be disabled, while firefox/session is loading.
Impatiently waiting for the fix!