Folks, I’m seeing a lot of people recommend setting xpinstall.signatures.required to false to fix the Firefox extensions issue.


It disables signature checking on extensions which means that you open yourself up to malicious extensions if you install any new ones or if you have auto updates on.

Either follow the instructions here by @amolith

Or go the officially recommended (but less private) route:



@aral firefox-esr: Debian disabled 'studies' probably for security/privacy reasons. Enable it if you wish using about:config. Debian: Excellent comment there by Bill Allombert: ***"The fact that this bug allows Mozilla to disable remotely security extensions like noscript is a major security issue."*** xpinstall.signatures.required = false (and disable addon auto-updates) looks safer than allowing studies.

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