Odpovim si sam:
Extension files that aren’t hosted on AMO will have to be submitted to AMO for signing. Developers will need to create accounts and a listing for their extension, which will not be public. These files will go through an automated review process and sent back signed if all checks pass.
Installation of unsigned extensions will still be possible on Nightly and Developer Edition, as well as special, unbranded builds of Release and Beta that will be available mainly for developers testing their extensions.
Safra, to uz se asi do uprav addonu nikdy moc nepohrnu...