Dialogue box says Firefox running but unable to find to close

Quite often when it is required to close Firefox on downloading ,a dialogue box pops and says that Firefox needs to be closed down. There is no icon to click in order to close and Task Manager does not indicate that Firefox is running. The option is to reboot the computer which I have to do to continue the download which I had started. The Firefox context menu does not offer a shutdown/close option. I tried to send a screenshot, but this page does not want to accept anything copied, pasted,or dragged and dropped. .

Did you first pause any current downloads?
Use "Firefox > Exit" (Windows: Firefox/File > Exit; Mac: Firefox > Quit Firefox; Linux: Firefox/File > Quit) to close Firefox if you are currently doing that by clicking the close X on the Firefox title bar.
Make sure to look under the Processes tab in the Windows Task Manager and not on the Applications tab.
You can't attach a screenshot to the first post that starts a thread, but you can do that in subsequent replies.
*https://support.mozilla.org/kb/how-do-i-create-screenshot-my-problem
Use a compressed image type like PNG or JPG to save the screenshot.

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

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Okay ... the Apple Application Support stage of things might be a factor on the iTunes install here too. Since we're doing installs on a mostly clean machine, I'm suspecting interference from your security software, and we'll try attending to that possibility first.
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While trying to open Firefox, the dialogue box says another version is open and I'm unable to open any version

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Is this what you downloaded: iTunes 10.7?
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Hello,
'''Try Firefox Safe Mode''' to see if the problem goes away. Safe Mode is a troubleshooting mode, which disables most add-ons.
''(If you're not using it, switch to the Default theme.)''
* You can open Firefox 4.0+ in Safe Mode by holding the '''Shift''' key when you open the Firefox desktop or Start menu shortcut.
* Or open the Help menu and click on the '''Restart with Add-ons Disabled...''' menu item while Firefox is running.
''Once you get the pop-up, just select "'Start in Safe Mode"''
'''''If the issue is not present in Firefox Safe Mode''''', your problem is probably caused by an extension, and you need to figure out which one. Please follow the [[Troubleshooting extensions and themes]] article for that.
''To exit the Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.''
You may also have malware, check with all programs.
* [http://www.microsoft.com/security/scanner/default.aspx Microsoft Safety Scanner]
* [http://www.malwarebytes.org/products/malwarebytes_free/ MalwareBytes' Anti-Malware]
* [http://support.kaspersky.com/faq/?qid=208283363 TDSSKiller - AntiRootkit Utility]
* [http://www.surfright.nl/en/hitmanpro/ Hitman Pro]
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[Home]/Library/Application Support/Adobe/SLStore
[Home]/Library/Application Support/Adobe/SLCache
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SAP MMC Says Dispatcher running but not connected to message server

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[Thr 4516] *** I listen to port sapmsNSP (3600) ***
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Looking for your valuable solutions.. Will definitely reward good points if gets solved
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There is now also a Weblog about https://weblogs.sdn.sap.com/pub/wlg/2479 [original link is broken] [original link is broken] [original link is broken] [original link is broken] [original link is broken] [original link is broken] [original link is broken] [original link is broken] [original link is broken] [original link is broken].
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install new copy on os
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See also:
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*Use "Disable all add-ons" on the [[Safe mode]] start window to disable all extensions.
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*https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

Dialogue box says Firefox running but unable to find to close

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