- Thank you, as their was no result on our computers I also checked on Mozillazine and someone came up with the simple solution to change the ixp setting in about:config to false
Is this the required setting? Code: xpinstall.signatures.required false It seems to work, but now it shows a warning for all add-ons.
wrong, I use 60.6.1esr and after having applied fix extension/add-on (link I share above) all extensions work (witout exclamation mark). I first had changed xpinstall... value in "about:config" to false though, but then after the fix I changed back to true. ps: Also re-downloaded all add-ons, but did not uninstall prior: simply followed the link in firefox 'obsolete add-ons' and added to "firefox". After a restart they are all here. edit: 2 mins after...they pushed a new update, everything's back in order it seems.
Yes it was a shambles, but it was fixed soon enough. All in all I will continue to use Firefox, until I find something better.