Are the accessibility features resolved in the newest Firefox version (66.0.3)?
Are the accessibility features resolved in the newest Firefox version (66.0.3)?
No, you don't have to keep xpinstall.signatures.required as false. Some extensions stop working when it's set that way. I believe Adblock Plus might fix the signature issues.
That was just a short hiccup... they missed updating a security certificate. They fixed it after a couple of days, so it should function again now if you restore its validity.