HP Smart Web Printing has caused that in the past: * See: https://support.mozilla.com/tiki-view_forum_thread.php?locale=en-US&comments_parentId=529687&forumId=1 * In the above, scroll down to Jacky's second post and click on the image attachment named 125.jpg Disable HP Smart Web Printing (Tools > Add-ons > Extensions, click HP Smart Web Printing, click Disable) then exit Firefox (File > Exit), restart Firefox and see if the problem is resolved. ------------------------------ <br /> The information submitted with your question indicates that you have out of date plugins with known security issues that should be updated. To see the plugins submitted with your question, click "More system details..." to the right of your original question post. * Shockwave Flash 10.0 r32 * Next Generation Java Plug-in 1.6.0_16 for Mozilla browsers #'''Check your plugin versions''': http://www.mozilla.com/en-US/plugincheck/ #*'''Note: plugin check page does not have information on all plugin versions''' #'''Update Shockwave Flash''' #*Use Firefox to Download and SAVE to your hard drive from one of the links below; '''<u>the links take you directly to the download and you avoid the "getplus" download manager and "extras" (i.e., toolbars, virus scan links, etc.) on the main Adobe page.</u>''' #*SAVE to your Desktop so you can find it #*After download completes, close Firefox #*Click on the file you just downloaded and install #**Note: Vista and Win7 users may need to right-click the installer downloaded and choose "Run as Administrator" #**Note: Most browsers other than IE will also get updated with this one download #**Note: To update IE, same procedure '''<u>but use IE</u>''' to go: http://fpdownload.macromedia.com/get/flashplayer/current/install_flash_player_ax.exe #*After installation, restart Firefox and check your version again. #*'''<u>Download links and other information</u>''': #** https://support.mozilla.com/en-US/kb/Managing+the+Flash+plugin#Updating_Flash #** '''<u>or</u>''' you can download, save, then run the manual installers for IE, then for Firefox (and all other browsers) from here: http://kb2.adobe.com/cps/191/tn_19166.html#main_ManualInstaller #* Also see: http://support.mozilla.com/en-US/kb/Installing+the+Flash+plugin #* Also see (if needed): http://kb2.adobe.com/cps/191/tn_19166.html#main_Uninstall #'''Update Java:''' #* Download and update instructions: https://support.mozilla.com/en-US/kb/Using+the+Java+plugin+with+Firefox #* Removing old versions (if needed): http://www.java.com/en/download/faq/remove_olderversions.xml #* Remove multiple Java Console extensions (if needed): http://kb.mozillazine.org/Java#Multiple_Java_Console_extensions #* After the installation, start Firefox and check your version again.

See also [[Troubleshooting extensions and themes]]

It started working by itself the next day; I didn't change a single thing. Weird.