More Print to file settings?

The settings in print to file option in Ubuntu is limiting and dangerous. All the applications apart from Mozilla print to a file ~/output.pdf, this is dangerous as you can overwrite a previous print.

Edit: I have been informed you are asked whether you wish to overwrite, unlike in cups-pdf

Why can't applications use the title of the document, the filename or the page title of the web page?

What package and where are the settings of this print to file held. I would prefer it printing to the desktop if it cannot intuitively chose a filename, as when it arrives on the desktop it would be a visual reminder for me to change the filename.

Previously I did not use the print to file feature, as the cups-pdf didn't have these short comings. But the latest releases including 12.04 of cups-pdf has been botched and all text are converted to images before embedding them in the pdf. Making the PDFs useless as it prevents the selecting of text and the sharpness of the text is lost too. The bug has been reported for sometime now, https://bugs.launchpad.net/ubuntu/+source/cups-pdf/+bug/820820 and as usual been labelled as a wish list feature.

So my question is where in the system is the ~/output.pdf set?

so one can change it to the desktop.

There is currently a GnomeGoal dedicated to change this: https://live.gnome.org/GnomeGoals/PrintToFile

However as it looks now, not many Gnome Applications implement this yet.