Disappearing Addons

It looks like for now anyway, Mozilla has disabled signature requirements or something. I have 2 installs of Firefox, I had my addons disabled for a few hours on my primary display. I needed to do the re-enable telemetry and studies tweak, close then re-open Firefox - wallah, everything began to reappear. I opened my second Firefox install on my second display (large flat panel tv), same version of Firefox... I did this about an hour later, by then Mozilla made some changes so the second install needed no attention, everything was in place as if nothing happened. So I suppose some of you waking up may have dodged a bullet, but for many millions of users the last few hours were quite discomforting, having all your addons disabled for no apparent reason.

All hail the kings of the digital world, thank you for making our decisions for us.. you have our best interest in mind (I'm sure) every time you tell us what we can or cannot do, say, think, wear, believe, eat, drink, read, vote on, speak about...

1. Clarified that the Studies fix applies only to Desktop users of Firefox distributed by Mozilla. Firefox ESR, Firefox for Android, and some versions of Firefox included with Linux distributions will require separate updates. (May 4, 12:03 EST)

2. We’re aware that some users are reporting that their extensions remain disabled with both studies active. We’re tracking this issue on Bugzilla in bug 1549078. (May 4, 12:03 EST)

3. Clarified that the study may appear in either the Active studies or Completed studies of “about:studies” (May 4, 12:10 EST)

4. Updated the post to clarify that deleting extensions can result in data loss, and should not be used to attempt a fix. (May 4, 12:58 EST)

5. Temporarily disabled commenting on this post given volume and duplication. They’ll be re-enabled as more updates become available. (May 4, 13:02 EST)

6. There are a number of work-arounds being discussed in the community. These are not recommended as they may conflict with fixes we are deploying. We’ll let you know when further updates are available that we recommend, and appreciate your patience. (May 4, 15:01 EST)

For more up-to-date updates, see below:
https://blog.mozilla.org/addons/2019/05/04/update-regarding-add-ons-in-f...
https://discourse.mozilla.org/t/certificate-issue-causing-add-ons-to-be-...
https://twitter.com/mozamo

https://news.ycombinator.com/item?id=19826903

Confirmed working on the Portable Apps version. It's the fix Mozilla are deploying.
Don't forget to backup 'data' folder just in case.

Mozilla fixed this issue with the release of 66.0.4 which has just been pushed out.

Latest update from Mozilla:

I have also staged this on the release channel for 52-60 where it is pending relman signoff once QA is happy.

Source: https://bugzilla.mozilla.org/show_bug.cgi?id=1549604#c53

Temporary fix to enable extensions/add-ons while you wait for official Mozilla's fix:

1. Exit Firefox Portable
2. Replace "appDisabled":true with "appDisabled":false and replace "signedState":-1 with "signedState":2 in the file called extensions.json using any text editor of your choice. Save and set the file permission to read only.
3. Start Firefox Portable. Disable and then enable extensions/add-ons on Firefox Portable.

Mozilla has released an extension to fix the expired intermediate certificate issue for Firefox 52-56. You can remove the extension after it has downloaded the new intermediate certificate to your existing Firefox portable. To verify it has successfully downloaded the new intermediate certificate, open Browser Console (Ctrl+Shift+J on Win and Linux, Cmd+Shift+J on Mac) and look for:

WebExtensions: new intermediate certificate added

Alternatively, if you don't want to install the above extension on your existing Firefox portable, you can install the extension on a clean install of Firefox 52-56 portable and then export and import the new intermediate certificate into your existing Firefox portable.