Mozilla scrambles to fix certificate bug disabling Firefox add-ons
A widespread certificate issue causes most Firefox extensions to suddenly stop working for users. Mozilla actively works on a resolution to restore the disabled add-ons.
A sudden certificate expiration issue causes most Firefox extensions to become disabled for users across the globe. The unexpected bug prevents the browser from properly verifying the digital signatures of installed add-ons, forcing Firefox to automatically turn them off as a safety measure.
Mozilla confirms that this problem stems from an expired intermediate signing certificate rather than a malicious attack. Because the browser relies on these certificates to ensure extensions remain unaltered and safe, the expiration triggers a built-in security feature that blocks the add-ons from running.
Engineers at Mozilla actively work to deploy a fix that resolves the signing verification process and re-enables the affected extensions. In the meantime, affected users find their browsing experience significantly disrupted, as essential tools like ad-blockers and password managers remain temporarily offline.