This problem happened to me when I set up an webdavs share used an incorrect configuration on my server. Using this (incorrect) share, Firefox whould open the "davs://" URI. When I'd fixed the error however, nautilus opened the share like it should.
I suppose it could be that the server sends an error back over http, which causes nautilus to pass the error-page to Firefox. If it helps, the error in my Apache2 config file was in the Alias directive: ... Alias /shared "/var/www_dav_shared/" <Directory /var/www_dav/shared> ... Here the <Directory> points to the wrong location. In my browser the error was ignored, but Nautilus probably detected it. -- webdavs opens firefox in nautilus https://launchpad.net/bugs/70690 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs