They are all localized Google domains. https://github.com/davidahmed/wiper/blob/master/manifest.json https://github.com/davidahmed/wiper/blob/master/manifest.j

They are all localized Google domains. https://github.com/davidahmed/wiper/blob/master/manifest.json https://github.com/davidahmed/wiper/blob/master/manifest.jso... EDIT: Even better, they're also listed right on the extension's page: https://addons.mozilla.org/en-US/firefox/addon/wiper/ https://addons.mozilla.org/en-US/firefox/addon/wiper/ Left side, "Permissions" (click to view all)