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.