Mozilla issues new Firefox update to fix add-ons problems and warns users not to try dubious workarounds

On Friday, an expired security certificate caused frustration and confusion for Firefox users as extensions were disabled and rendered unusable. Having delivered a patch through its Studies system (which did not work for everyone), Mozilla has now issued a browser update which it says will fix the problem for more people, although it warns that "there are remaining issues that we are actively working to resolve".