Comment 82 for bug 41179

(In reply to Mikko Rantalainen from comment #64)
> For Gnome compatible environments: there's no ready-made extension at
> addons.mozilla.org but you can fetch the latest version from
> https://github.com/infinity0/mozilla-gnome-keyring or if you use Ubuntu, you
> can add PPA from https://launchpad.net/~fat-lobyte9/+archive/ppa-public and
> install package called "mozilla-gnome-keyring" which will add password
> integration for both Firefox and Thunderbird.

This is only partly correct as this does not seem to work on Ubuntu >= 12.10. [1] Now I know that Ubuntu is not the only GNOME-based distro and Mozilla doesn't seem to be the one to blame for these particular difficulties, but I as a user of both Ubuntu and Firefox would love to see an implementation of this feature...

[1] https://github.com/infinity0/mozilla-gnome-keyring/issues/26