Hi Late on Friday May 3rd, we became aware of an issue with Firefox that prevented existing and new add-ons from running or being installed. We are very sorry for the inconvenience caused to people who use Firefox. Please do not delete your add-ons as an attempt to fix. You will lose any data related to the add-on. Disabled add-ons will not lose any data. We rolled-out a fix for release, beta and nightly users on Desktop. There is no fix available for Android at this time. The team is working on it. We are working on a general fix that doesn’t need to rely on this and will keep you updated.