Update 8/5: If the initial fix didn’t cure your problems with extensions being disabled, Mozilla has released a new version of Firefox which you should update to (Firefox 66.0.5). A patch for older versions of Firefox is also underway.
Update 4/5: The fix is out, Mozilla says (opens in new tab), so extensions should be working again. You don't have to do anything to get your browser patched, as the update should be applied automatically.
Our original story is below...
If you're struggling to get your Firefox extensions working today, you're not alone – a technical glitch has rendered all add-ons unusable, and Mozilla is currently working on a fix.
As Engadget (opens in new tab) reports, it looks like an out-of-date certificate has borked everyone's extensions, as Firefox is simply recognizing them as incompatible.
Tweets from the official Firefox browser (opens in new tab) and Mozilla Add-ons (opens in new tab) accounts show that the issue is being worked on behind the scenes, but as yet there's no estimated time for when everything will be back working normally.
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It sounds as though the problem should be cleared up sooner rather than later though – we'll update this article if we hear anything more.
With the vast library of extensions one of the main reasons for choosing Firefox as a browser, no doubt millions of users are feeling inconvenienced today.
From blocking ads and cleaning up page layouts, to quickly sharing pages to social media and streamlining downloads, Firefox add-ons can provide a big boost in functionality on top of the core browser itself.
You can even use Firefox extensions on the Android version of the browser, so they can travel around on your smartphone.
"So sorry for the issue we’re having with add-ons right now," Firefox said in a tweet (opens in new tab). "We’re working hard to fix it and will keep you updated."