remove method allows to simply reset a permission for an app which is running inside the browser app.
var value = navigator.mozPermissionsettings.remove(permission, manifest, origin)
- A string with the name of the permission to retrieve.
- A string representing the URL of the manifest of the app to check, or for an app running inside the browser, the URL of the browser app manifest.
- A string representing the domain name of the app.
Not part of any specification.