Hi, I'm a newbie here, so please bear with me . . . 

I got a new Dell desktop computer in February with Windows 7 Home Premium.  Works beautifully!  Loaded everything I wanted/needed without any problems, even set up a wireless connection to my Canon MX340 printer that was previously connected to my old computer by USB.  Worked great for a while, but since updating my Firefox browser to v28 mid March, whenever I go to print something from within Firefox, I get this error message:

"An error occurred while printing"

THAT'S IT!  THAT'S ALL IT SAYS!  I have been round and round with Mozilla and their "help", which has been no help at all.  I've updated the print drivers.  I've uninstalled and reinstalled both the printer AND Firefox.  No change.  I know that the problem is NOT the printer, as it prints perfectly from Internet Explorer and Chrome.  I don't know what to do anymore.  If anyone can help me with this, I'd be so grateful!

Thanks in advance!
  Print Issues in FireFox...Hi patio,

Thank you for your reply.  Unfortunately, I have already exhausted everything from this list, as this was the FIRST thing Mozilla sent when I contacted them for help.  None of those "fixes" solved my problem.

I appreciate your time!  Anytime...
It's possible ver 28 does have this issue...you can always REVERT BACK to the last build for now if that 1 worked for you.Hi again patio!

Thank you for your continued support on this!  I have actually installed two different previous versions of Firefox and tried to print, thinking that would do the trick, but I still could not print with either version.  I think I'm missing something here because I have another desktop computer RUNNING the same OS as my new computer (Windows 7 64-bit) and that one prints from Firefox without any problems!  Redo that checklist then...one of your print settings in FFox is wrong it appears....The only thing that checklist says to do in reference to print settings is to "reset" the print.printer one, which I've already done.  It also says to completely reset Firefox, which I've already done, and last it says to try to print in Safe Mode, which, you guessed it - I've already done.  I've even gone so far as removing Firefox COMPLETELY (I mean anything and everything Mozilla) and installing a fresh copy.  Still, I get that same dreaded error message.  Is the printer showing up properly in Device Manager ? ?
Any Yellow !!'s ? ?Yes, the printer shows it's online and ready.  No yellow "!"'sHmmm...this is a stumper...re-set the router yet ? ?
WORTH a try...I know, right!?  Now I'm updating the drives that Dell says I need...  It's gonna be awhile, so I'll post again when it's through.  Thank you so much!!!!