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Can't print from Firefox - "Printer Error- An unknown error occured while printing"


I am unable to print anything from Firefox! I am using Firefox 19.0.2.

I performed a "Reset To Default State" for Firefox yesterday to fix some performance issues. Those issues are resolved, but now I can't print!

I am able to print to 'Microsoft XPS Document Writer' and save as an .xps file. But I am unable to actually print to my HP LaserJet printer.

Here are the steps I have taken trying to resolve the printing issue-

I opened the prefs.js file in WordPad and removed all entries beginning with 'print'. (When it did not resolve the issue, I restored the prefs.js file with a backup)

I downloaded and installed the latest driver for my printer from HP.

Still unable to print from Firefox after taking those steps. Note that I am able to print from any program other than Firefox.

What steps can I take to fix this issue?

Additional System Details

Installed Plug-ins

  • Shockwave Flash 11.6 r602
  • 5.1.20125.0
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • RealPlayer(tm) LiveConnect-Enabled Plug-In
  • RealPlayer Download Plugin
  • VLC media player Web Plugin 2.0.2
  • RealNetworks(tm) RealDownloader Chrome Background Extension Plug-In
  • RealNetworks(tm) RealDownloader PepperFlashVideoShim Plug-In
  • RealNetworks(tm) RealDownloader HTML5VideoShim Plug-In
  • RealDownloader Plugin
  • iTunes Detector Plug-in


  • Firefox 19.0.2
  • User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:19.0) Gecko/20100101 Firefox/19.0
  • Support URL: http://support.mozilla.org/1/firefox/19.0.2/WINNT/en-US/


  • DoNotTrackMe (donottrackplus@abine.com)
  • Easy YouTube Video Downloader 6.7 ({c0c9a2c7-2e5c-4447-bc53-97718bc91e1b})
  • Memory Restart 1.12 (memoryrestart@teamextension.com)
  • Troubleshooter 1.0a (troubleshooter@mozilla.org)
  • RealDownloader 1.3.0 ({34712C68-7391-4c47-94F3-8F88D49AD632}) (Inactive)


  • incrementalGCEnabled: True


  • adapterDescription: Mobile Intel(R) 4 Series Express Chipset Family
  • adapterDescription2:
  • adapterDeviceID: 0x2a42
  • adapterDeviceID2:
  • adapterDrivers: igdumd64 igd10umd64 igdumdx32 igd10umd32
  • adapterDrivers2:
  • adapterRAM: Unknown
  • adapterRAM2:
  • adapterVendorID: 0x8086
  • adapterVendorID2:
  • direct2DEnabled: True
  • directWriteEnabled: True
  • directWriteVersion: 6.2.9200.16492
  • driverDate: 10-4-2012
  • driverDate2:
  • driverVersion:
  • driverVersion2:
  • info: {u'AzureContentBackend': u'direct2d', u'AzureCanvasBackend': u'direct2d', u'AzureFallbackCanvasBackend': u'cairo'}
  • isGPU2Active: False
  • numAcceleratedWindows: 2
  • numTotalWindows: 2
  • webglRenderer: Google Inc. -- ANGLE (Mobile Intel(R) 4 Series Express Chipset Family)
  • windowLayerManagerType: Direct3D 10

Modified Preferences

  • accessibility.browsewithcaret: True
  • browser.cache.disk.smart_size.first_run: False
  • browser.cache.disk.smart_size.use_old_max: False
  • browser.cache.disk.smart_size_cached_value: 358400
  • browser.link.open_newwindow: 2
  • browser.places.smartBookmarksVersion: 4
  • browser.sessionstore.interval: 60000
  • browser.sessionstore.restore_on_demand: False
  • browser.startup.homepage: https://www.google.com/
  • browser.startup.homepage_override.buildID: 20130307023931
  • browser.startup.homepage_override.mstone: 19.0.2
  • browser.tabs.onTop: False
  • browser.tabs.warnOnClose: False
  • browser.tabs.warnOnOpen: False
  • dom.mozApps.used: True
  • extensions.lastAppVersion: 19.0.2
  • gfx.direct3d.checkDX10: False
  • network.cookie.prefsMigrated: True
  • network.http.pipelining: True
  • network.http.proxy.pipelining: True
  • places.database.lastMaintenance: 1363309582
  • places.history.expiration.transient_current_max_pages: 104858
  • plugin.disable_full_page_plugin_for_types: application/pdf
  • privacy.sanitize.migrateFx3Prefs: True


  • User JS: No
  • Accessibility: No
Asiangem 1 solutions 2 answers

For those who get the same printer error in Firefox "An unknown error occurred while printing" , make sure to try the "reset" button for FireFox. I had the same message but I tried the reset button and it worked for me.

WinSum666 0 solutions 5 answers

Trying to print a web-page to the XPS printer - Getting this error message: 'an error occured while printing'

I have 2 computers, each is running a newly installed Windows 7 OS and each has Firefox v23.0.

One system works fine, I can print an XPS with no problems. My other system is the one that was giving me the error message: 'an error occured while printing'.

This was driving me crazy, two systems, essentially identical (same OS and same browser).

I remembered, that, I had enabled The Windows UAC... I disabled the UAC and the problem went away! No more problem.

I'm not sure why UAC is blocking the XPS printing (probably do to it's coming from the web) so I'll have to investigate further. Until, then, I'm able to print XPS with no printer errors!

This may help others with a similar problem - try disabling your UAC, if it's enabled and you are getting the same printer error message.

sklein65 0 solutions 1 answers

Helpful Reply

This is a recurring problem, when I need to print some thing I use PALE MOON BROWSER. I have never had this problem before. My suggestion is; always have a second browser just in case there is a difficult situation. Suzanne.

WinSum666 0 solutions 5 answers

Helpful Reply

@sklein65 I thank you for your reply. My problem occurred when trying to print to the XPS printer, I found, that, if I disabled the UAC, the problem went away. You may want to give this a try. You can access you UAC by entering 'UAC' in the Window's Search Box. I had an additional problem with my 'Pinned' websites becoming unusable, I traced this down to Firefox version 24 (beta channel). I reverted back to v23.0 and I never had the problem, again. Note, that, all versions of v23.0 worked, the problem occurred when v24 was installed. I disabled all auto updating in Firefox.