REALLY?!?!?!? Not one reply yet from anyone at Mozilla? Come on, guys!!!

Hi!

Sorry for the delay in our response, we understand that your time is precious and that printing is a need for what you do.

Have you tried visiting Canon for new printer software or updates that may resolve this issue? Also, have you tried uninstalling the printer software and installing it back and setting up your printer?

Thanks and sorry for inconvenience.

Hi Andrew,

Thank you for trying to help! Yes, I have gone to the Canon website and tried installing the drivers they have for my printer but my computer said it already had newer drivers already installed.

I have even gone so far as completely uninstalling everything Canon and starting over from scratch with the original printer software that came with the printer. No luck.

There's got to be something within Firefox that is blocking my printer. Like I stated in my original post, everything works fine when I'm in other browsers like Internet Explorer, Google, or Iron.

What else could it be?

In order to be able to find the correct solution to your problem, we require some more non-personal information from you. Please do the following:

• Click the Firefox button at the top left, then click the Help menu and select Troubleshooting Information from the submenu. If you don't have a Firefox button, click the Help menu at the top and select Troubleshooting Information from the menu.

Now, a new tab containing your troubleshooting information should open.

• At the top of the page, you should see a button that says "Copy text to clipboard". Click it.
• Now, go back to your forum post and click inside the reply box. Press Ctrl+V to paste all the information you copied into the forum post.

If you need further information about the Troubleshooting information page, please read the article Use the Troubleshooting Information page to help fix Firefox issues.

Thanks in advance for your help!

Thank you again, Andrew for your reply. Here is the information you requested from the Troubleshooting page . . .

Application Basics

Name: Firefox Version: 28.0 User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:28.0) Gecko/20100101 Firefox/28.0

Crash Reports for the Last 3 Days

All Crash Reports

Extensions

Name: avast! Online Security Version: 9.0.2013.75 Enabled: true ID: [email protected]

Name: DuckDuckGo Plus Version: 0.3.16 Enabled: true ID: jid1-ZAdIEUB7XOzOJw@jetpack

Name: HTTPS-Everywhere Version: 3.4.5 Enabled: true ID: [email protected]

Name: MaskMe Version: 1.40.349 Enabled: true ID: [email protected]

Name: Myibidder (Myibay) Bid Sniper for eBay Version: 1.3.7 Enabled: true ID: [email protected]

Name: NoSquint Version: 2.1.9 Enabled: true ID: [email protected]

Name: Remember Passwords Version: 1.1 Enabled: true ID: remember-passwords@stanimir-stamenkov.addons.mozilla.org

Name: WOT Version: 20131118 Enabled: true ID: {a0d7ccb3-214d-498b-b4aa-0e8fda9a7bf7}

Important Modified Preferences

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print.printer_Canon_MX340_series_Printer.print_bgcolor: false print.printer_Canon_MX340_series_Printer.print_bgimages: false print.printer_Canon_MX340_series_Printer.print_colorspace: print.printer_Canon_MX340_series_Printer.print_command: print.printer_Canon_MX340_series_Printer.print_downloadfonts: false print.printer_Canon_MX340_series_Printer.print_duplex: 184157360 print.printer_Canon_MX340_series_Printer.print_edge_bottom: 0 print.printer_Canon_MX340_series_Printer.print_edge_left: 0 print.printer_Canon_MX340_series_Printer.print_edge_right: 0 print.printer_Canon_MX340_series_Printer.print_edge_top: 0 print.printer_Canon_MX340_series_Printer.print_evenpages: true print.printer_Canon_MX340_series_Printer.print_footercenter: print.printer_Canon_MX340_series_Printer.print_footerleft: &PT print.printer_Canon_MX340_series_Printer.print_footerright: &D print.printer_Canon_MX340_series_Printer.print_headercenter: print.printer_Canon_MX340_series_Printer.print_headerleft: &T 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print.printer_Canon_MX340_series_Printer.print_plex_name: print.printer_Canon_MX340_series_Printer.print_resolution: 0 print.printer_Canon_MX340_series_Printer.print_resolution_name: print.printer_Canon_MX340_series_Printer.print_reversed: false print.printer_Canon_MX340_series_Printer.print_scaling: 1.00 print.printer_Canon_MX340_series_Printer.print_shrink_to_fit: true print.printer_Canon_MX340_series_Printer.print_to_file: false print.printer_Canon_MX340_series_Printer.print_unwriteable_margin_bottom: 0 print.printer_Canon_MX340_series_Printer.print_unwriteable_margin_left: 0 print.printer_Canon_MX340_series_Printer.print_unwriteable_margin_right: 0 print.printer_Canon_MX340_series_Printer.print_unwriteable_margin_top: 0 print.printer_Canon_MX340_series_Printer_(Copy_1).print_bgcolor: false print.printer_Canon_MX340_series_Printer_(Copy_1).print_bgimages: false print.printer_Canon_MX340_series_Printer_(Copy_1).print_colorspace: 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print.printer_Canon_MX340_series_Printer_(Copy_1).print_in_color: true print.printer_Canon_MX340_series_Printer_(Copy_1).print_margin_bottom: 0.5 print.printer_Canon_MX340_series_Printer_(Copy_1).print_margin_left: 0.5 print.printer_Canon_MX340_series_Printer_(Copy_1).print_margin_right: 0.5 print.printer_Canon_MX340_series_Printer_(Copy_1).print_margin_top: 0.5 print.printer_Canon_MX340_series_Printer_(Copy_1).print_oddpages: true print.printer_Canon_MX340_series_Printer_(Copy_1).print_orientation: 0 print.printer_Canon_MX340_series_Printer_(Copy_1).print_page_delay: 50 print.printer_Canon_MX340_series_Printer_(Copy_1).print_paper_data: 0 print.printer_Canon_MX340_series_Printer_(Copy_1).print_paper_height: 11.00 print.printer_Canon_MX340_series_Printer_(Copy_1).print_paper_name: print.printer_Canon_MX340_series_Printer_(Copy_1).print_paper_size_type: 1 print.printer_Canon_MX340_series_Printer_(Copy_1).print_paper_size_unit: 0 print.printer_Canon_MX340_series_Printer_(Copy_1).print_paper_width: 8.50 print.printer_Canon_MX340_series_Printer_(Copy_1).print_plex_name: print.printer_Canon_MX340_series_Printer_(Copy_1).print_resolution: 43 print.printer_Canon_MX340_series_Printer_(Copy_1).print_resolution_name: print.printer_Canon_MX340_series_Printer_(Copy_1).print_reversed: false print.printer_Canon_MX340_series_Printer_(Copy_1).print_scaling: 1.00 print.printer_Canon_MX340_series_Printer_(Copy_1).print_shrink_to_fit: true print.printer_Canon_MX340_series_Printer_(Copy_1).print_to_file: false print.printer_Canon_MX340_series_Printer_(Copy_1).print_unwriteable_margin_bottom: 0 print.printer_Canon_MX340_series_Printer_(Copy_1).print_unwriteable_margin_left: 0 print.printer_Canon_MX340_series_Printer_(Copy_1).print_unwriteable_margin_right: 0 print.printer_Canon_MX340_series_Printer_(Copy_1).print_unwriteable_margin_top: 0 privacy.sanitize.migrateFx3Prefs: true privacy.sanitize.timeSpan: 0 storage.vacuum.last.index: 1 storage.vacuum.last.places.sqlite: 1394721346

Graphics

Adapter Description: NVIDIA GeForce GT 635 Adapter Drivers: nvd3dumx,nvwgf2umx,nvwgf2umx nvd3dum,nvwgf2um,nvwgf2um Adapter RAM: 1024 Device ID: 0x1280 Direct2D Enabled: true DirectWrite Enabled: true (6.2.9200.16571) Driver Date: 3-26-2013 Driver Version: 9.18.13.1147 GPU #2 Active: false GPU Accelerated Windows: 1/1 Direct3D 10 Vendor ID: 0x10de WebGL Renderer: Google Inc. -- ANGLE (NVIDIA GeForce GT 635 Direct3D9Ex vs_3_0 ps_3_0) windowLayerManagerRemote: false AzureCanvasBackend: direct2d AzureContentBackend: direct2d AzureFallbackCanvasBackend: cairo AzureSkiaAccelerated: 0

JavaScript

Incremental GC: true

Accessibility

Activated: false Prevent Accessibility: 0

Library Versions

NSPR Expected minimum version: 4.10.3 Version in use: 4.10.3

NSS Expected minimum version: 3.15.5 Basic ECC Version in use: 3.15.5 Basic ECC

NSSSMIME Expected minimum version: 3.15.5 Basic ECC Version in use: 3.15.5 Basic ECC

NSSSSL Expected minimum version: 3.15.5 Basic ECC Version in use: 3.15.5 Basic ECC

NSSUTIL Expected minimum version: 3.15.5 Version in use: 3.15.5

please try to uninstall avast for testing purposes.

Hello Phillipp,

Thank you for also trying to solve this.

Would it be alright if I just disabled the avast antivirus for testing? And how long will testing take once it starts? I'd need to know exactly when to disable it.

Thank you!

i have recommended this procedure because quite a few other users have reported that the printer dialog doesn't show up with firefox 27 and up and avast. many antivirus programs still stay active in the background even if their UI shows them as disabled - so i think it's better to test it by uninstalling avast. after a restart it should be immediately apparent if printing works again in firefox.

Ok, I'll uninstall avast! and try to print . . . I will let you know the results!

Uninstalled the avast! antivirus and restarted the computer. Attempted to print something from Firefox - NOTHING! Got the same error message! WHAT IS GOING ON HERE?!?!?!?

I'm reinstalling avast! now . . .

By the way, I also disabled all my add-ons before attempting to print. Thought it would help. :(

I'm enabling those add-ons now . . .

hello, what error message are you getting - this would be a useful information in assessing the problem?

It says, "An error occurred while printing".

I have this problem as well with my Canon printer. I have installed the latest software/drivers from Canon's website. Tried various solutions from this site including disabling A/V software, run diagnostics & my Canon printer will not print from Firefox. I don't get any error msgs just a Windows error sound & no print dialog. Printer works fine with any other program on my desktop including Explorer. Problem started with Firefox 27, then also with v28. Uninstalled Firefox, then reinstalled older v26.0 & printer problems went away...

Hi RJDBANDIT,

Yep! That's exactly my problem - STILL! I just figured that it's a Firefox issue and until they come up with a new version that corrects this, I'm going to use either Internet Explorer or Iron browsers if I need to print anything. There's nothing wrong with the printer, I know that. Maybe I'll do what you did and downgrade to FF v26 . . .

UPDATE: 3/31/14 Uninstalled FF 28 and reinstalled FF 26. DID NOT HELP AT ALL! STILL GET THE SAME ERROR MESSAGE: "An error occurred while printing".

I do not know what is wrong anymore. I have already done the following things to try to solve this: 1) Uninstalled/reinstalled FF (different versions) - same results. 2) Ran FF WITHOUT use of Avast! Antivirus - same results. 3) Ran FF WITHOUT use of Private Firewall - same results. 4) Uninstalled/reinstalled printer and printer drivers - same results. PRINTER WORKS FINE ON MY OTHER COMPUTER RUNNING SAME OPERATING SYSTEM, WINDOWS 7. 5) Reset FF - same results. 6) Ran CCleaner - same results. 7) Ran Malwarebytes Antimalware Premium - same results. 8) Tried to print with add-ons DISABLED - same results.

I DON'T KNOW WHAT TO ANYMORE. SOMEONE PLEASE HELP!!!  :(

UPDATE #2, 4/1/14

DISCOVERED THE ISSUE WAS A PLUG-IN AUTOMATICALLY PUT ON MY MACHINE DIRECTLY FROM THE CANON PRINTER INSTALL DISC. ONCE I REMOVED THE PLUG-IN (ONE SPECIFIC .DLL FILE WAS REALLY CAUSING THE PROBLEM), MY PRINTER WORKS IN FIREFOX AGAIN!

IF YOU HAVE THE PLUG-IN FROM CANON TITLED, "CANON iMAGE GATEWAY Album Plugin Utility" YOU MAY WANT TO DELETE IT FROM FIREFOX AND YOUR COMPUTER. THE SPECIFIC .DLL FILE (NPEZFFPI.DLL), DOES NOT PLAY NICE WITH FIREFOX FOR SOME REASON.

JUST WANTED TO PUT THAT OUT THERE IN CASE ANYONE IS EXPERIENCING PRINT ISSUES WITH FIREFOX AND THEIR CANON PRINTER.

Answer to: Firefox no longer recognizes wireless printer! 1. Click Help in Menu Bar.2. Click Trouble shooting Information. 3. Click Reset Firefox and follow instructions...It worked for me and it also saved my history and favorite bookmarks, etc

Hi limnerbill,

Thanks for trying to help, but your solution was the very first thing I tried back in March when this problem first came up. It didn't work for me.

Thanks for trying, though and glad it worked for you!

FINAL POST:

Called Dell support and it was determined that my operating system had several corrupted files and was helped to install a fresh copy of Windows.

PROBLEM SOLVED!