good AddOn

But do you really need all these permissions?
like reading the clipboard? really??...

ask for too much access of personal data. why they need it for? sell them to third party? is just a scam used by the author to build another app using the data he collect with this app avoiding to buy that info he needs.

Save button won't close dialog anymore after you remove a keyboard shortcut assignment (afterwards whole settings UI is broken and won't refresh anymore, you must manually refresh it to see changes), the GeoIP look up itself is broken (the map doesn't appear, complians about invalid API key) and there is no option to not have this extension in the page context menu (I hate extensions that clutter up my context menu for no useful reason).

One of the best and easy to use cleaners available.