If you cannot see any content on pages you printed or in print preview, the cause might be margins which are set too high. #In order to check the margins, we need to go to ''File'' > ''Page Setup''. #Once this is done, switch to the ''Margins & Header/Footer'' tab. #Check what's set there under ''Margins''. The following are the default values for ''Margins'': '''Right''': 12.7 '''Top''': 12.7 '''Left''': 12.7 '''Bottom''': 12.7 Check these values accordingly and change them if necessary. OR <!-- XXX you may wish to edit this greeting, and other parts of the response so that it is personalised to the question asked.--> , Certain Firefox problems can be solved by performing a ''Clean reinstall''. This means you remove Firefox program files and then reinstall Firefox. Please follow these steps: '''Note:''' You might want to print these steps or view them in another browser. #Download the latest Desktop version of Firefox from http://www.mozilla.org and save the setup file to your computer. #After the download finishes, close all Firefox windows (click Exit from the Firefox or File menu). #Delete the Firefox installation folder, which is located in one of these locations, by default: #*'''Windows:''' #**C:\Program Files\Mozilla Firefox #**C:\Program Files (x86)\Mozilla Firefox #*'''Mac:''' Delete Firefox from the Applications folder. #*'''Linux:''' If you installed Firefox with the distro-based package manager, you should use the same way to uninstall it - see [[Installing Firefox on Linux]]. If you downloaded and installed the binary package from the [http://www.mozilla.org/firefox#desktop Firefox download page], simply remove the folder ''firefox'' in your home directory. #Now, go ahead and reinstall Firefox: ##Double-click the downloaded installation file and go through the steps of the installation wizard. ##Once the wizard is finished, choose to directly open Firefox after clicking the Finish button. More information about reinstalling Firefox can be found [[Troubleshoot and diagnose Firefox problems#w_5-reinstall-firefox|here]]. <b>WARNING:</b>Do not use a third party uninstaller as part of this process. Doing so could permanently delete your [[Profiles|Firefox profile]] data, including but not limited to, extensions, cache, cookies, bookmarks, personal settings and saved passwords. <u>These cannot be easily recovered unless they have been backed up to an external device!</u> See [[Back up and restore information in Firefox profiles]]. <!-- Starting in Firefox 31, the Firefox uninstaller no longer lets you remove user profile data.Ref: Bug 432017 and https://support.mozilla.org/kb/uninstall-firefox-from-your-computer/discuss/5279 [Fx31] Windows uninstaller will no longer offer the option to remove personal data --> Please report back to say if this helped you! Thank you.

It's probably not any faster than restarting Windows, but the next time this happens, could you try clearing the information Firefox has accumulated about your printer in its preferences file? This article has more information about that option: [[Fix printing problems in Firefox]]. Also, if you notice any pattern of events leading up to this problem, that might help unravel the mystery.

To jscher2000: I tried your solution, then held my breath and waited. I have not had another incident, so I guess it worked. Thank you.