'An anonymous reader quotes CNET: "Mozilla on Sunday began distributing new Firefox updates to fix a problem that broke extensions for many browser users on Friday," reports CNET:

Mozilla had released an update Saturday, but Sunday's fix should help more people who were still affected. "There are some issues we're still working on, but we wanted to get this release out and get your add-ons back up & running before Monday," Mozilla said in a tweet Sunday... "No active steps need to be taken to make add-ons work again. In particular, please do not delete and/or reinstall any add-ons as an attempt to fix the issue," Kev Needham, Mozilla's product manager for add-ons, said in a blog post about the problem.'

-- source: https://news.slashdot.org/story/19/05/05/2315224

Cheers, Peter