Printing from Firefox to network printer does not work

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http://askubuntu.com – I just noticed that since using Ubuntu 12.04(.01) or since some update (can't tell it for sure) I cannot print from Firefox to my network printer (Samsung CLX-3175FN) any more. For a very short moment I can see the Printer icon in the panel on top and then it's gone and nothing happens. Printing from other applications like Evince or Adobe Acrobat works (so this is not a duplicate of: Can't print from Adobe Reader or from Firefox ) I have found a forum entry from somebody having the same issue: http://ubuntuforums.org/showthread.php?p=12486689#post12486689 However, other than the poster (HowTos)