Comment 3 for bug 1056118

The security PPA is https://launchpad.net/~ubuntu-mozilla-security/+archive/ppa. The packages should already have been copied from there to the archive, and I thought they already had been.

The thunderbird-stable and firefox-stable PPA's have been obsolete and unmaintained for months. That is not where the latest stable releases go anymore, and hasn't been for ages. I even blogged to tell people that they didn't need them anymore.