Why were all my addons/extensions for FF v66.0.3 moved to 'Legacy Extensions' on one PC, when they weren't moved on in v.66.0.3 on another PC?
All of a sudden I found all of my addons/extensions in FF 66.0.3 have been disabled and moved to 'Legacy Extensions' on one of my Windows 7 PCs. I have FF 66.0.3 installed on a Windows 10 system with the same group of extensions, and none there have been disabled/moved. Here's a list:
F.B Purity 28.1.0.0 Flash Block (Plus) 0.1.9 Ghostery 8.3.3 New Tab Override 14.2.0 Save Page WE 14.0 uBlock Origin 1.18.6
Thanks for any feedback on what may be causing this, and any suggestions on how to restore these addons on the Windows 7 system.
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Mozilla has rolled-out a fix for this. The fix will be automatically applied in the background within the next few hours, you don’t need to take active steps.
In order to be able to provide this fix on short notice, they are using the Studies system. You can check if you have studies enabled
- Go to [=] > Options > Privacy & Security.
- Make sure Allow Firefox to install and run studies is check marked.
I you had it disabled, you can disable studies again after your add-ons have been re-enabled.
They are working on a general fix that doesn't need to rely on this and will keep you updated.
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See these threads about to add the certificate manually:
- /questions/1258208 plugins could not be verified firefox esr 52
- /questions/1258275 How do I re-enable the add-ons WITHOUT being forced to upgrade