A temporary solution: Go to Options / Privacy & Secutity => Firefox Data Collection and Use and check "Allow Firefox to install and run studies". It'll be fixed in 1-2 minutes, bringing back all addons.
After fixing, above options can be disabled again, keeping addons working as always.
Waiting for the final fix...
Yep, worked for me, all extensions now enabled and working again.
Computer Type: PC/Desktop System Manufacturer/Model Number: It's a Dell, Dude. OS: Win 7 32, Win 7 64 Pro, Win 8.1 64 Pro, Win 10 64 Education Edition, Win 11 Pro CPU: 12th Gen Intel(R) Core(TM) i9-12900 2.40 GHz Motherboard: Father is bored too. Graphics Card: NVIDIA GeForce RTX 3070 Ti Monitor(s) Displays: 27" Samsung Monitor/Alternative Dimensional Viewing Portal Screen Resolution: Fuzzy after a couple drinks Keyboard: Steel Series Glow in the dark.... Mouse: currently being stalked by the cat... Case: Don't get on my case....man Cooling: Scotch on the rocks on the weekends.. Hard Drives: 2 or 3, depending on if it's a night they're arguing about having a "split personality crisis" because I partitioned the drive. Internet Speed: Never fast enough... Browser: Defeated by Mario...wait...OH...BRowser... Antivirus: Various
Options > Privacy & security
Just make sure this option is selected and Mozilla will do the work for you as a temporary measure
When I went to bed last night there was a Windows Update that the system did before it shut down. When I restarted a few minutes ago all of my extensions were restored and everything worked so i didn't go and do the above procedure.
Computer Type: Laptop System Manufacturer/Model Number: HP E1P13AV OS: Windows 10 Pro CPU: Intel i7-4700MQ Memory: 8 GB Graphics Card: Intel HD Graphics 4600 Hard Drives: Hybrid system with 24 Gb SSD and 1T HDD
When I went to bed last night there was a Windows Update that the system did before it shut down. When I restarted a few minutes ago all of my extensions were restored and everything worked so i didn't go and do the above procedure.
Once you enable studies and your add-ons are restored, you can disable studies again.
Computer Type: Laptop System Manufacturer/Model Number: Apple MacBook Pro 2020 (m1) 13" OS: MacOS Big Sur CPU: Apple m1 Monitor(s) Displays: 13" Screen Resolution: 2560x1600
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