How can I disable signature checking for Firefox add-ons?
Since version 42, Firefox, by default, refuses to install unsigned add-ons. How do I disable this verification? It is only possible to disable addons verification in Nightly and Developer channel. In other words it is not possible in Beta versions and standard releases . Go to about:config (enter it into address bar) Set xpinstall.signatures.required to false . More at https://wiki.mozilla.org/Addons/Extension_Signing Disable add-on signing check in Release (all) versions of Firefox Firefox version 65+ (or so) The following instructions will disable signature checking on Firefox for the