Firefox Extensions Automatically Disabled by Expired Security Certificate
A widespread glitch causes nearly all Firefox extensions to stop working due to an expired code signing certificate. Mozilla issues an automatic patch to restore functionality without requiring user action.
A widespread glitch currently disables nearly all Firefox extensions and labels them as "legacy" add-ons. This sudden failure occurs because an intermediate code signing certificate built into the browser expires, triggering security warnings that prevent the extensions from loading properly.
Re-installing the affected extensions does not resolve the issue, as the underlying certificate problem simply generates a different error message. Instead, Mozilla actively works on a server-side patch to address the root cause of the failure and restore normal browser functionality.
Mozilla successfully resolves the issue for the standard desktop version of Firefox by pushing an automatic background update. The company explicitly advises users against deleting or re-installing their add-ons to prevent the permanent loss of associated extension data.