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About this Add-on
Dustman is an extension that closes tabs you don't need anymore. By default it closes tabs which haven't been used in the last 20 minutes, leaving at least 5 tabs open. It ignores pinned tabs and these which haven't been seen yet. If somehow Dustman closes tab which you still need, you can simply restore it using Dustman's panel.
If you have any feature requests, please contact me on github.