Well, I regret to give not give five stars but it took me an hour to ascertain that it does not work, whatever options I choose. Tested on the web interface of openstack. Also, why does it need to "access your data for all websites" when it should run only on certain tabs?
Thanks for the review, I will check the issue with openstack. Regarding "Access your data for all websites" and "Access browser tabs" permission, which is required to inject JavaScript code which will make the add-on work as intended. Rest assured, this add-on does not collect any user data, refer Privacy policy for more details.
