Firefox fix restores broken browser extensions

Mozilla Firefox sticker

, also called add-ons, let you customize browsers to do things like block ad or offer video-playback speed controls. requires they be digitally signed to improve . The certificate Mozilla uses for that purpose expired, though, so Firefox started disabling extensions it no longer considered safe.

Mozilla advised people to wait for the . “The fix will be automatically applied in the background within the next few hours,” Kev Needham, Mozilla’s product manager for add-ons, said in a blog post early Saturday morning. “No active steps need to be taken to make add-ons work again. In particular, please do not delete and/or reinstall any add-ons as an attempt to fix the issue.”

Unfortunately for Firefox users and Mozilla, the fix doesn’t reach everyone. Mozilla is updating Firefox with an unusual mechanism, the studies tool for testing new features, and some people may have disabled that. The fix doesn’t yet work for Firefox on Android or the slower-moving Extended Support Release (ESR) version of Firefox. And some people aren’t getting the update, Mozilla said on Twitter on Saturday.
Many Firefox users saw an alert like this one telling them their extensions had been disabled.

Many Firefox users saw an alert like this one telling them their extensions had been disabled.

Security certificates make the computing world go round, and renewing them is a routine part of computing operations. But if a renewal slips through the cracks, it can affect everything from software updates to the ability to use websites protected by encryption.

During the US government shutdown earlier in 2019, more than 130 federal websites suffered from weakened security because employees weren’t at work to renew certificates.

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