In this case, their own hypocrisy was to blame. I bitterly complained when centralized signing of addons was pushed by Mozilla, and now it has come back to bite them. So how do I get Firefox to install it, though? And, I tried sending studies and whatever it is but to no avail. Samuel Vuorela Thank you very much for this info! Suddenly my firefox browser disabled ALL add-ons, and I realized it when a webpage that I frequently visit suddenly displaying all kinds of adds. This sounds like a clever plan to get more people to share their data via Studies…. I was out, but just came back and the add-ons are back on! Thank you Mozilla. We will share a more substantial update in the coming days. It may take up to six hours for the Study to be applied to Firefox. Firefox users can check if they have Studies enabled by going to. This system is enabled by default, and no action is needed unless Studies have been disabled. To provide this fix on short notice, we are using the Studies system. Deleting an add-on removes any data associated with it, where disabling and re-enabling does not. No active steps need to be taken to make add-ons work again. The fix will be automatically applied in the background within 24 hours. We are very sorry for the inconvenience caused to people who use Firefox.

Late on Friday May 3rd, we became aware of an issue with Firefox that prevented existing and new add-ons from running or being installed.

Lastpass not working on firefox