Checks to make sure that the backup state isn't being loaded in a popup window. Adds a test for the scenario which causes this bug. Differential Revision: https://phabricator.services.mozilla.com/D227119
Checks to make sure that the backup state isn't being loaded in a popup window. Adds a test for the scenario which causes this bug. Differential Revision: https://phabricator.services.mozilla.com/D227119