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.

Hi Kantilal, Firefox for Android has a preference to bypass signature verification for extensions. This obviously is not as safe, but might be the best compromise in the short run until the Tor team announces their version of the fix.

(1) In a new tab, type or paste about:config in the address bar and submit that. Click the button promising to be careful or accepting the risk if presented.

(2) In the search box above the list, type or paste xpin and pause while the list is filtered

(3) Tap the xpinstall.signatures.required preference to show a Toggle button, then tap Toggle to switch the value from true to false

Unfortunately, this creates the potential for a bad actor to serve Firefox an unsigned update, so it's definitely not a long-term fix. You can turn off extension auto-updating as a mitigation:

(4) In the search box above the list, type or paste autoup and pause while the list is filtered

(5) Tap the extensions.update.autoUpdateDefault preference to show a Toggle button, then tap Toggle to switch the value from true to false

Hopefully this won't be needed for very long.