One needs to remember to check if this addon is paused when tabs aren't closing. Especially before leaving a bad review. Derp.

Stupendous! Very well thought out! Best tab limiter/manager I've ever used. Closes tabs that haven't been used for whatever time period you choose yourself, but keeps a database of what was closed that is in effect just as if the tab was never closed, that you can see simply by clicking the toolbar icon. Tab gone? Okay, reopen it from the list. Tree Style Tab users: placing the icon right above the sidebar reduces the pain of looking for it. I keep mine right between the back and forward buttons. LOVE IT!!