Firefox won't open, it won't even show me an error message, it's unresponsive.

I was running firefox, then I clicked on a new webpage and it would not load. So I closed it firefox all together and tried to restart, but I kept getting the error message that it was already running (when it wasn't). I opened my Task Manager and saw that it was not running. So I restarted my computer and reopened firefox. It opened and ran for about 5 minutes before it wouldn't load a webpage again. So I went through the steps again, restarting my computer, only this time firefox would not open at all.
== This happened ==
Not sure how often
== This just started ==
== User Agent ==
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; .NET CLR 3.5.30729; .NET CLR 3.0.30729)

'''Kill Application'''
In Task Manager, does firefox.exe show in the '''Processes''' tab?
See: [http://kb.mozillazine.org/Kill_application Kill Application]
'''Causes and solutions for Firefox hanging at exit:'''
[[Firefox hangs]]
[http://kb.mozillazine.org/Firefox_hangs#Hang_at_exit Firefox hangs at exit]
[[Firefox is already running but is not responding]]
'''Safe Mode'''
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 '''before''' 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 '''one at a time''' until the problem reappears. '''You MUST close and restart Firefox after EACH change''' via File > Restart Firefox (on Mac: Firefox > Quit). You can use "Disable all add-ons" on the Safe mode start window.

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Firefox won't start, there is no error message and it is not already running.

Hi,
When I try to click on firefox, the little wait icon appears and then disappears. Nothing opens, not even safe mode. I've looked at the "Firefox won't start and there is no error message" help section and looked at my task manager processes. It seems that when I click firefox, it briefly appears on my processes and then disappears. This happened yesterday while I was in the middle of using it. At the same time, my Skype also crashed, which makes me think the two are correlated. The two programs still don't work. The only way that I can open firefox is if I install it all over again with the "launch firefox now" option checked at the end. When I have a firefox window open, I can open other firefox windows just fine. When I close it, nothing opens. Thanks for your help.

1) Start Task Manager
2) Open Processes (make the description area large enough to see)
3) look for a description that says ''firefox''
4) Select it and press End Process
'''Now Firefox should work properly.'''

Firefox won't launch - I get an error message saying that firefox has to close

It tells me it's sending a message to firefox but as I can't log in it won't do this.

I've just (finally) managed to fix this problem today. I checked the Apple Support forums, and it seems a lot of people are having the same problem.
I rang the Apple Support line, and the very helpful man (thanks Alan!) talked me through it stage by stage. If you go to the following page on the internet: http://support.apple.com/kb/TS5376 it takes you through the process. WARNING - it takes a little time!
Basically, the first thing you have to do is go to your Program Files and double click on your iTunes folder. There'll be a number of files with the suffix .dll - you need to move all the .dll files from that folder to your desktop - you can simply click and drag them on the desktop..
Next, uninstall iTunes - go to Control Panel / Add/Rempve Programs and when the list comes up remove iTunes. This will take a few minutes... Then reboot your computer.
Next, go back to Control Panel / Add Remove and Remove - IN THIS ORDER -
Apple Software Update
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Apple Application Support
Reboot again!
Next, check in your Program Files that the iTunes folder is completely gone - if it has, great: if it hasn't, right-click on the folder and press Shift and Delete - it will say "Are you sure you want to completely remove the folder "iTunes"? Click on "Yes".
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Firefox won't even open now that I've installed Snagit - what can I do to fix this?

Today I bought and downloaded Snagit (TechSmith) for Macintosh. When the program was being installed it asked me if I wanted a nifty Firefox extension installed. I stupidly (as it turns out) agreed! Now, Firefox won't even open. I've tried restarting the computer and still no luck. How can I diagnose the problem with Firefox? (I know that I could just download Firefox again but I don't want to lose my many bookmarks etc.)
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The warranty entitles you to complimentary phone support for the first 90 days of ownership.

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I cannot access download.mozilla.org. I need to do a fresh install after something went wrong with my updates and now Firefox won't even open so I am using Safari. I don't know why I can't get download.mozilla.org: is it because I am in China and it's now been blocked or is there a problem with the website?
== I downloaded the updates. ==
== User Agent ==
Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_4; en-us) AppleWebKit/533.16 (KHTML, like Gecko) Version/5.0 Safari/533.16

Do a clean reinstall and download a fresh Firefox copy from http://www.mozilla.com/firefox/all.html and save the file to the desktop. 
Uninstall your current Firefox version and remove the Firefox program folder before installing that copy of the Firefox installer. 
It is important to delete the Firefox program folder to remove all the files and make sure that there are no problems with files that were leftover after uninstalling.
You can skip the step to create a new profile, that is not necessary for this issue.
See http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Clean_reinstall

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It worked for me, any way we have to do following things now, I have seen this happens becasue of the corrupt dll for Visual C++ packages. if the following thing will not work, I am affraid we have to reinstall the windows 7
Good Luck
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I noticed when I restart Firefox 4, it opens my previous tabs even I set the option "Open a blank page" and it opens blank page when I have "Show my windows and tabs from last time". Please ignore my question if you're already aware of this issue. Thanks.

I noticed when I restart Firefox 4, it opens my previous tabs even I set the option "Open a blank page" and it opens blank page when I have "Show my windows and tabs from last time". Please ignore my question if you're already aware of this issue. Thanks.

Your previous tabs will not re-open or be available to re-open when starting Firefox if:
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*you use Clear Recent History (''Firefox button > History > Clear Recent History'' or ''Tools > Clear Recent History''); see --> https://support.mozilla.org/en-US/kb/Clear%20Recent%20History#w_how-do-i-clear-my-history
*you clear History automatically when closing Firefox; see --> https://support.mozilla.org/en-US/kb/Clear%20Recent%20History#w_how-do-i-make-firefox-clear-my-history-automatically
NOTE: Your third-party Plugins (Add-ons > Plugins) are not in the "Application Basics" (Troubleshooting Information) in the "More system details" of your original post. Third-party Plugins are categorized separately in "Installed Plugins" under "More system details". You should review but not change the Plugins as detected automatically by the software on this forum when posting a question.
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*See --> [http://support.mozilla.org/en-US/kb/Troubleshooting+extensions+and+themes Troubleshooting extensions and themes]
*See --> [http://support.mozilla.org/en-US/kb/Troubleshooting+plugins Troubleshooting plugins]
*See --> [http://support.mozilla.org/en-US/kb/Basic+Troubleshooting Basic Troubleshooting]
'''If this reply solves your problem, please click "Solved It" next to this reply when signed-in to the forum.'''

HT201272 So I preorered an album from iTunes and now it won't download into my libraray. It says that I purchased it on iTunes, but it won't even show up in the "Purchsed" library in my account. Does anyone know what I am supposed to do to downlaod it?

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If you can't enter the passcode then you have to place the iPod in recovery mode and then restore the iPod via iTunes. For ecovery mode see:
iPhone and iPod touch: Unable to update or restore
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itunes store won't open. It tries and then stops. no error messages. I've reinstalled and same thing happens. any ideas?

Hi Guys:-
If this SAME problems is effecting us all then suspect its not IPS problem as we all get problem at 995.6MB.
I would think that there is some kind of software conflict. If we all having this problem just think of how many users have the same but are not on this discussion board, bet you its 100s and 100s.
Not possible for me to visit store now but will monitor your responce's.
Good luck guys, lets make um give us a fix:- I will call them tomorrow and see what they say:- should point support to this Discussion page and they can answer us !
Cheers and good luck also

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Bad job guys, this is dumb, I am disappointed.
I've followed instructions found in the following links with no luck:
https://support.mozilla.org/en-US/questions/833603
https://support.mozilla.org/en-US/questions/1019367
https://support.mozilla.org/en-US/questions/1018231
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*Help > Troubleshooting Information > Profile Directory: Show Folder (Linux: Open Directory; Mac: Show in Finder)
*http://kb.mozillazine.org/Profile_folder_-_Firefox
*http://kb.mozillazine.org/Multiple_profile_files_created
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You can leave the sessionstore.bak file with the time stamp appended that Firefox creates automatically in case of updating.
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If you have such software then check the settings or uninstall this software.

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http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01980797&tmp_task=solveCategory&cc=us&dlc=en&la...
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If I have helped in any way, just click the Kudos star on the left. Also, if your issue has been resolved, don't forget to select Accept as Solution

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Firefox won't open, it won't even show me an error message, it's unresponsive.

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