Pretty much. There's a preference you can change to allow unsigned extensions, but it only works in dev/nightly firefox and "unbranded editions" of release/beta

Pretty much. There's a preference you can change to allow unsigned extensions, but it only works in dev/nightly firefox and "unbranded editions" of release/beta firefox. https://wiki.mozilla.org/Add-ons/Extension_Signing#FAQ https://wiki.mozilla.org/Add-ons/Extension_Signing#FAQ