Firefox disabled 95% of addons because it "can't verify" them today. I haven't installed/changed any addons for months.
I started my computer today and all but ~3 of my addons had been disabled, citing "____ could not be verified for use in Firefox and has been disabled". They've all been labeled as legacy addons and disabled. This includes addons which I installed specifically because they were upkept after the Quantum/webkit switchover. I haven't changed or installed any addons for the past few months and am on the most recent version of firefox.
This includes uMatrix and Tampermonkey, which I need to be protected from malicious sites.
I tested removing one of these addons and reinstalling (Video DownloadHelper, since I don't care about it), and only got a "Download failed. Please check your connection." message. I get the same message when trying to download addons I've never had from the mozilla site as well, so I can't seem to install any replacement security addons either.
Chosen solution
Mozilla has rolled-out a fix for this. The fix will be automatically applied in the background within the next few hours, you don’t need to take active steps.
In order to be able to provide this fix on short notice, they are using the Studies system. You can check if you have studies enabled
- Go to [=] > Options > Privacy & Security.
- Make sure Allow Firefox to install and run studies is check marked.
I you had it disabled, you can disable studies again after your add-ons have been re-enabled.
They are working on a general fix that doesn't need to rely on this and will keep you updated.
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There is a problem with the certificate that is used to sign some extensions. This is being worked by the Add-ons team.
See:
- [/questions/1257928] Will the disabling of add-ons be fixed, or is it the new way?
- https://discourse.mozilla.org/t/certificate-issue-causing-add-ons-to-be-disabled-or-fail-to-install/39047
At about 6:10 PST we received a report that a certificate issue for Firefox is causing add-ons to stop working and add-on installs to fail. Our team is actively working on a fix. We will update as soon as we have more information.
Chosen Solution
Mozilla has rolled-out a fix for this. The fix will be automatically applied in the background within the next few hours, you don’t need to take active steps.
In order to be able to provide this fix on short notice, they are using the Studies system. You can check if you have studies enabled
- Go to [=] > Options > Privacy & Security.
- Make sure Allow Firefox to install and run studies is check marked.
I you had it disabled, you can disable studies again after your add-ons have been re-enabled.
They are working on a general fix that doesn't need to rely on this and will keep you updated.