All extensions disabled due to expiration of intermediate signing cert

Update: We have rolled out a partial fix for this issue. We generated a new intermediate certificate with the same name/key but an updated validity window and pushed it out to users via Normandy (this should be most users). Users who have Normandy on should see their add-ons start working over the next few hours. We are continuing to work on packaging up the new certificate for users who have Normandy disabled.

I read at https://discourse.mozilla.org/t/certificate-issue-causing-ad...

>12:50 p.m. UTC / 03:50 a.m. PDT: We rolled-out a fix for release, beta and nightly users. 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, we are using the Studies system. You can check if you have studies enabled by going to Firefox Preferences -> Privacy & Security -> Allow Firefox to install and run studies.

>You can disable studies again after your add-ons have been re-enabled.

>We are working on a general fix that doesn’t need to rely on this and will keep you updated.

I refuse to enable studies, even temporarily. This comes very close after the IE6 conspiracy revelation, where ends justifies the means.

Please provide a link to the certificate file, and step by step instructions for installing it, without enabling and conflating with mozilla studies...

JSON response from the `normandy` API here: https://xor.cat/assets/other/random/2019-05-04/normandy_sign...

hotfix-update-xpi-signing-intermediate-bug-1548973: https://storage.googleapis.com/moz-fx-normandy-prod-addons/e...

From the looks, it installs the above plugin, and changes `app.update.lastUpdateTime.xpi-signature-verification` to `1556945257`

I can't get it to work in ESR 60 though. Getting file not found on "resource://gre/modules/addons/XPIDatabase.jsm"

edit: The linked XPI definitely seems to add the new certificate, whatever mechanism used to reverify the signatures just doesn't seem to work in 60.

edit2: Restarting Firefox appears to have forced the reverify... Possibly a flag that I twiddled with though, hard to be sure. Either way, the above should help people get everything running again without having to enable studies/normandy.

Thanks for the sleuthing, but who does this repository belong to? I'd like to apply it but only if mozilla provides such instruction on their issue page, I don't know who the actual owner of /moz-fx-normandy-prod-addons/ is...

https://storage.googleapis.com/moz-fx-normandy-prod-addons/e...

Can mozilla please verify, confirm authenticity, and list this instruction on their issue page?