An update to ESR 60.6.3 is also available as of 16:00 UTC May 8th. You’ll get an update notification within 24 hours, or you can initiate an update manually. Firefox 66.0.5 has been released, and we recommend that people update to that version if they continue to experience problems with extensions being disabled.These extensions will not require users to enable Studies, and we’ll provide an update when they are available. For anyone still experiencing issues in versions 61 through 65, we plan to distribute a fix through a user-installable extension. This fix will also be available as a user-installable extension. Users who enabled Studies to receive the temporary fix, and have updated to the permanent fix, can now disable Studies if they desire.For users who cannot update to the latest version of Firefox or Firefox ESR, we plan to distribute an update that automatically applies the fix to versions 52 through 60. The initial, temporary fix that was deployed May 4th through the Studies system is replaced by these updates, and we recommend updating as soon as possible. We’ve released Firefox 66.0.5 for Desktop and Android, and Firefox ESR 60.6.3, which include the permanent fix for re-enabling add-ons that were disabled starting on May 3rd.Mozilla CTO Eric Rescorla posted a blog on the technical details of what went wrong last weekend.If you enabled telemetry to get the initial fix, we’re deleting all data collected since May 4. A less technical blog post about the outage is also available.If you are running Firefox versions 47 – 56: install this extension to resolve the expired security certificate issue and re-enable extensions and themes.If you are running Firefox versions 57 – 60: Install this extension to resolve the expired security certificate issue and re-enable extensions and themes.If you are running Firefox versions 61 – 65 and 1) did not receive the deployed fix and 2) do not want to update to the current version (which includes the permanent fix): Install this extension to resolve the expired security certificate issue and re-enable extensions and themes.Updates – Last updated 14:35 PST May 14, 2019.

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