Hanging at exit is most often caused by an Extension or a Plugin. <u>'''Kill Application'''</u> In Task Manager, does firefox.exe show in the <u>'''Processes'''</u> tab? See: [http://kb.mozillazine.org/Kill_application Kill Application] '''<u>Causes and solutions for Firefox hanging at exit:</u>''' [[Firefox hangs]] [http://kb.mozillazine.org/Firefox_hangs#Hang_at_exit Firefox hangs at exit] [[Firefox is already running but is not responding]] <u>'''Safe Mode'''</u> You may need to use '''[[Safe Mode]]''' (click on "Safe Mode" and read) to localize the problem. Firefox Safe Mode is a diagnostic mode that disables Extensions and some other features of Firefox. If you are using a theme, switch to the DEFAULT theme: Tools > Add-ons > Themes <u>'''before'''</u> starting Safe Mode. When entering Safe Mode, do not check any items on the entry window, just click "Continue in Safe Mode". Test to see if the problem you are experiencing is corrected. See: '''[[Troubleshooting extensions and themes]]''' '''[[Troubleshooting plugins]]''' '''[[Basic Troubleshooting]]''' If the problem does not occur in Safe-mode then disable all of your Extensions and Plug-ins and then try to find which is causing it by enabling <u>'''one at a time'''</u> until the problem reappears. <u>'''You MUST close and restart Firefox after EACH change'''</u> via File > Restart Firefox (on Mac: Firefox > Quit). You can use "Disable all add-ons" on the Safe mode start window. -------------------------------- <u>'''''Other Issues'''''</u>: ~~red:You have installed plug-ins with known security issues. You should update them immediately.~~ <u>'''Install/Update Adobe Reader for Firefox (aka Adobe PDF Plug-In For Firefox)'''</u>: your ver. 9.3.2; current ver. 9.3.3 (important security update release 06-29-2010; see: http://www.adobe.com/support/security/bulletins/apsb10-15.html) ~~red:Check your version here~~: http://www.mozilla.com/en-US/plugincheck/ See: http://support.mozilla.com/en-US/kb/Using+the+Adobe+Reader+plugin+with+Firefox#Installing_and_updating_Adobe_Reader ''<u>You may be able to update from the Adobe Reader installed on your system</u>'' instead of going to the Adobe site and downloading. Start > Program Files, find and click Adobe Reader to open, click Help, click Check for Updates. Allow the download/update to occur. If you use this method, no need to proceed with the instructions below, <u>'''but'''</u> do look at the two bulleted items at the bottom "'''<u>NOTE for IE:</u>'''" and "Also see:". Restart Firefox and check your new version here: http://www.mozilla.com/en-US/plugincheck/ ''<u>If you go to the Adobe site to download the current Adobe Reader:</u>'' -'''<u>use Firefox to download</u>''' and <u>'''SAVE to your hard drive'''</u> (save to Desktop for easy access) ~~red:-See the images at the bottom left of this post to see the steps to take on the Adobe site~~ -exit Firefox (File > Exit) -check to see that Firefox is completely closed (''Ctrl+Alt+Del, choose Task Manager, click Processes tab, if "firefox.exe" is on the list, right-click "firefox.exe" and choose End process, close the Task Manager window'') -double-click on the Adobe Reader installer you just downloaded to install/update Adobe Reader *<u>'''NOTE: On Vista and Windows 7'''</u> you may need to run the plugin installer as Administrator by starting the installer via the right-click context menu if you do not get an UAC prompt to ask for permission to continue (i.e nothing seems to happen). See this: http://vistasupport.mvps.org/run_as_administrator.htm *'''<u>NOTE for IE:</u>''' Firefox and most other browsers use a Plugin. IE uses an ActiveX version. To install/update the IE ActiveX version, same instructions as above, except use IE to download the ActiveX installer. See: [[ActiveX]] *Also see: http://kb.mozillazine.org/Adobe_Reader ~~red:'''''AND'''''~~ [[How do I edit options to add Adobe to the list of allowed sites]]