Public bug reported:
Binary package hint: firefox
Using CUPS and printing to a Samsung SCX-4521F multi-function printer,
Firefox always send document as 300dpi. Printer default is 600dpi and
all other programs send print jobs at 600dpi. Problem started in the
previous version of Ubuntu. Upgraded
** Attachment added: "Dependencies.txt"
http://launchpadlibrarian.net/52003210/Dependencies.txt
** Attachment added: "ExtensionSummary.txt"
http://launchpadlibrarian.net/52003211/ExtensionSummary.txt
** Attachment added: "profile_default_pluginreg.dat.txt"
http://launchpadlibrarian.net/
Fix provided upstream in Firefox bug tracker:
http://support.mozilla.com/en-US/forum/1/504098
"As user, open a shell and enter:
lpoptions -o Resolution=600dpi
This will add a default resolution to ~/.cups/lpoptions"
After following these instructions, Firefox prints to 600DPI by default.
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Mo