Firefox won't close properly in Vista or Win7

We (my wife and I) have been dealing with this issue for the last year. It's gotten to the point we are ready to migrate back to IE!
Situation:
Boot system
open FF browser
enjoy FF with its addon and browsing ease.
leave FF on and leave for a couple hours
upon returning, click on a new site or try to change pages on same site and it shows it is trying to load the page but NEVER does...
So you close FF, upon trying to open again it says another copy is running, so we bring up taskmgr, find the FF highlight it, click end process and finally we can open FF again.
I have tried it with our plugin's and w/o our plugins and it doesn't seem to make any difference.

See "Hang at exit":
* http://kb.mozillazine.org/Firefox_hangs
* [[Firefox hangs]]

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Perform the suggestions mentioned in the following articles:
* [[Firefox is already running but is not responding]]
-> Profile in use
* [http://kb.mozillazine.org/Profile_in_use]
Check and tell if its working.

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Firefox won't close and has now got 'stuck'!

Hi
My version of Firefox on my home PC (v3.6, I think) always takes a short while before it completely closes.
If I close down Firefox but then restart it again because I've forgotten something it will give me an error message saying that Firefox needs to close completely before I can open it again.
That's fine - I can live with that.
However, last night I did exactly this - needed to reopen Firefox before it had completely closed and this time it has got stuck....I don't get the error message anymore. It won't open by double click, from Explorer or anything. I can't close it from Task Manager. I can't even uninstall it because it is "still open".
Can anyone help?
Thanks!

Firefox often doesn't close properly if I have been using the Blackboard 'virtual learning environment'. Task Manager always reveals that the Firefox process is still running and Java as well. Killing Java allows Firefox to close. Is there a more elegant way of ensuring that Java isn't going to block Fx from closing, e.g. because an applet is invisibly waiting for something? It would be good to have a way of pre-emptively 'clearing' Java before closing Firefox. (Gryllida's solution of disabling Java altogether isn't suitable, because Blackboard and many other sites need it.) Thanks.
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David

Firefox does not close properly making reopening later impossible without rebooting computer.

I live in Texas and my sister lives in Georgia. We are both experiencing problems with closing Firefox. It appears to close properly but when I try to reopen later in the day, my computer tells me that it is still running in the back ground and cannot be reopened. I tried upgrading to the latest version but the problem persists. When I go into Task Manager, I can't find an entry for Firefox to close out.

Press '''CTRL+SHIFT+ESC''' to open Task Manager, go to the '''Processes '''menu, right click on '''firefox.exe''' and choose '''Kill Process'''.
When you finish a browsing session, go to '''File '''| '''Exit '''to close it if the problem persists.
Try disabling the McAfee Virtual Technician plugin via '''Tools '''| '''Add-ons''' | '''Plugins'''.
Update Flash player: [http://get.adobe.com/flashplayer/ Download Flash player 10.2.159.1] See also: [http://www.h-online.com/security/news/item/Adobe-releases-security-update-for-Flash-Player-1228930.html Adobe Security Update closes Zero Day Exploit]
Update Java via Windows Control Panel | Java | Update Now
If the problem persists in spite of the above steps, try running Firefox in [[Safe Mode]]. If it functions properly in that configuration, then one of your add-ons is the culprit.

I have a problem closing tabs in Firefox v3.6.13. The first tab on the left hand side (ie the page that opens when I launch Firefox) won't close when I click on the red x.

I can't close the left hand tab except by exiting firefox. When i launch firefox the original tab stays open when I click on the red x, even if I have other tabs open.
i can alter the website displayed on the left hand tab but it still won't close and leave other more recent tabs open.

Start Firefox in [[Safe Mode]] to check if one of the add-ons is causing the problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).
* Don't make any changes on the Safe mode start window.
See:
* [[Troubleshooting extensions and themes]]

Firefox won't close

Since yesterday's upgrade, firefox won't fully close. It'll look like it has closed when I hit the red x but when I try to open a new instance I'll get an error saying that it's already running and can't be opened again until it's fully shut down.
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http://support.mozilla.com/en-US/kb/Safe+Mode
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Right mouse click the iTunes icon and select "Run as Administrator"

Firefox still won't close properly

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I have that problem too. Actually, I've had that problem with Firefox 3.6.15.
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Firefox won't close without using Task Manager - end process; can't start in safe mode or disable add-ons

I've been having a memory leak/hanging problem for weeks -- FF slowly increases memory usage until it's at almost 100% and then freezes and I have to shut it down via Task Manager/end process.
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Have you already tried clearing the browser cache, opening a blank tab, and trying to open some other website ?
* [[how to clear the cache]]
Instead of trying to open safe mode from within the User Interface menu have you tried alternative methods such as holding the shift key when you start Firefox. (After checking for running Firefox processes or plugincontainer and killing them if found )
* see [[safe mode]]
* [[firefox hangs]]
If using safemode does not help first of all try creating and using a new profile.
* [[Basic Troubleshooting#w_8-make-a-new-profile]]_8-make-a-new-profile
If all the above fail then try a clean re-install of Firefox
* [[Basic Troubleshooting#w_7-reinstall-firefox]]_7-reinstall-firefox

Firefox won't close/ flashplayer won't download to desktop -- getting dizzy!

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See if this happen in [https://support.mozilla.org/en-US/kb/Safe%20Mode Safe-mode] , if this is not happen then disable all extensions and then try to find which is causing it by enabling one at a time until the problem reappears.
Use "Disable all add-ons" on the Safe Mode start window to disable all extensions.
Close and restart Firefox after each change from File > Exit
[https://support.mozilla.org/en-US/kb/Troubleshooting-extensions-themes?redirectlocale=en-US&redirectslug=Troubleshooting+extensions+and+themes
Troubleshooting extensions and themes]
see also: [https://support.mozilla.org/en-US/kb/Firefox-hangs Firefox hangs]
thank you
Please mark "Solved" the answer that really solve the problem, to help others with a similar problem.

Firefox won't start properly. The process begins in task manager, but the program doesn't start.I have restarted the computor, and updated my plug-ins. Don't know what to do next. It will open in safe mode, but not regularly.

When we click on the icon to start firefox even though the process opens in task manager, the program screen doesn't open

If it does work in Safe-mode then disable all extensions and then try to find which is causing it by enabling one at a time until the problem reappears.
* Use "Disable all add-ons" on the [[Safe mode]] start window to disable all extensions.
* Close and restart Firefox after each change via "File > Exit" (Mac: "Firefox > Quit"; Linux: "File > Quit")
* https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes

Firefox won't close properly in Vista or Win7

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