None of these are disabled, but according to this I added to /etc/apt/preferences: Code: Package: * Pin: release l=Extras Pin-Priority: 1001
Package: * Pin: release l=Extras Pin-Priority: 1001
To keep from unintentionally upgrading to an extras-testing or extras-devel software version, it is possible to tell apt to always prefer stable packages over these other repositories via apt-pinning.