Firefox won't open after close.

Every time I close firefox it won't open back up. I kept deleting the old profile and it'd load up once and then after I closed it again it stopped working. I have narrowed the problem down. If I delete xpti.dat and compreg.dat it will start just fine, for one time. I am planning on making a sh script to do that automatically, but would still like to know why this is happening.

Hello Christopher.
Hopefully this support article is what you need:
http://support.mozilla.com/en-US/kb/Firefox+hangs
In any case, it's possible that you are having a problem with some Firefox add-on that is hindering your Firefox's normal behavior. Have you tried disabling all add-ons (just to check), to see if Firefox goes back to normal?
Whenever you have a problem with Firefox, whatever it is, you should make sure it's not caused by one (or more than one) of your installed add-ons, be it an extension, a theme or a plugin. To do that easily and cleanly, run Firefox in [http://support.mozilla.com/en-US/kb/Safe+Mode safe mode] (don't forget to select ''Disable all add-ons'' when you start safe mode). If the problem disappears, you know it's from an add-on. Disable them all in normal mode, and enable them one at a time until you find the source of the problem. See [http://support.mozilla.com/en-US/kb/Troubleshooting+extensions+and+themes this article] for information about troubleshooting extensions and theme and [https://support.mozilla.com/en-US/kb/Troubleshooting+plugins this one] for plugins.
If you need support for one of your add-ons, you'll have to contact its author.

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Try the procedures in the [[Firefox will not start]] article.

[SOLVED] Firefox won't open after restart..Until I updated everything

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I've checked my firewall and my antivirus programs, and they're not the culprit.
I've fully scanned my computer for viruses/malware.
My computer is completely up to date.
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Do a clean reinstall and delete the Firefox program folder before (re)installing a fresh copy of the current Firefox release.
Download a fresh Firefox copy and save the file to the desktop.
*Firefox 22.0: http://www.mozilla.org/en-US/firefox/all.html
Uninstall your current Firefox version, if possible, to cleanup the Windows registry and settings in security software.
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Remove the Firefox program folder before installing that newly downloaded copy of the Firefox installer.
*(32 bit Windows) "C:\Program Files\Mozilla Firefox\"
*(64 bit Windows) "C:\Program Files (x86)\Mozilla Firefox\"
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*http://kb.mozillazine.org/Uninstalling_Firefox
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If you keep having problems then also create a new profile.
*http://kb.mozillazine.org/Profile_folder_-_Firefox
*http://kb.mozillazine.org/Profile_backup
*http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Clean_reinstall

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*Firefox 23: http://www.mozilla.org/en-US/firefox/all.html
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*(32 bit Windows) "C:\Program Files\Mozilla Firefox\"
*(64 bit Windows) "C:\Program Files (x86)\Mozilla Firefox\"
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*http://kb.mozillazine.org/Uninstalling_Firefox
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*http://kb.mozillazine.org/Profile_folder_-_Firefox
*http://kb.mozillazine.org/Profile_backup
*http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Clean_reinstall

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Install the Page Speed browser add-on
Use Page Speed to evaluate the performance of your pages and get suggestions on how to improve them. Learn more
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See:
*https://support.mozilla.com/kb/Server+not+found
*https://support.mozilla.com/kb/Firewalls

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*https://support.mozilla.com/kb/Firewalls

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Any help would be appreciated.

Certain Firefox problems can be solved by performing a ''Clean reinstall''. This means you remove Firefox program files and then reinstall Firefox. Please follow these steps:
'''Note:''' You might want to print these steps or view them in another browser.
#Download the latest Desktop version of Firefox from http://www.mozilla.org and save the setup file to your computer.
#After the download finishes, close all Firefox windows (click Exit from the Firefox or File menu).
#Delete the Firefox installation folder, which is located in one of these locations, by default:
#*'''Windows:'''
#**C:\Program Files\Mozilla Firefox
#**C:\Program Files (x86)\Mozilla Firefox
#*'''Mac:''' Delete Firefox from the Applications folder.
#*'''Linux:''' If you installed Firefox with the distro-based package manager, you should use the same way to uninstall it - see [[Installing Firefox on Linux]]. If you downloaded and installed the binary package from the [http://www.mozilla.org/firefox#desktop Firefox download page], simply remove the folder ''firefox'' in your home directory.
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##Once the wizard is finished, choose to directly open Firefox after clicking the Finish button.
Please report back to see if this helped you!

Firefox won't open after update, black screen, beep and "do you want to allow program to make changes..."

Updated Firefox yesterday and now the program will not open on my desktop. Screen goes black for a second, issues a beep and then get box asking if I want to allow Firefox to make changes to my computer. Does not matter if I click yes or no, box disapears and nothing happens. Willing to remove and reload the program but hate to lose all my bookmarks.

'''Try the Firefox Safe Mode''' to see how it works there. The 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 the Firefox 4.0+ Safe Mode by holding the '''Shift''' key when you use the Firefox desktop or Start menu shortcut.
* Or use the Help menu item and click on the '''Restart with Add-ons Disabled...''' menu item while Firefox is running.
''Don't select anything right now, just use "'Start in Safe Mode"''
''To exit the Firefox Safe Mode, just close Firefox and wait a few seconds before using the Firefox shortcut (without the Shift key) to open it again.''
'''''If it is good in the 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.
''When you figure out what's causing your issues, please let us know. It might help other users who have the same problem.''

Firefox won't open after checking for add-on updates

Hi
i am having problems with Add-ons checking for updates.
The first problem is that in add-on manager, even though i have it set to automatically update add-ons, it has no history of finding any and it's failure to find a new version of a plug-in meant pdfs weren't opening see full details here ... https://support.mozilla.com/en-US/questions/829011
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can't believe that i was the only person to have the problem, but no replies whatsoever suggest i was. have now upgraded to 5.0 where the problem has not yet reoccurred.

Firefox won't open after update

I recently upgraded to the latest version of Firefox, 3.6.6. Since then, I cannot open
the program. I have discarded the old version, and reloaded - still no luck.

Some basic troubleshooting steps here.
http://support.mozilla.com/en-US/kb/Basic+Troubleshooting#Makea_newprofile
Support
http://support.mozilla.com/en-US/kb/
You can ask for help on the Firefox forum, no registration needed. Mention you are using Mac OSX.
http://forums.mozillazine.org/viewforum.php?f=38

Firefox won't open after last update on a Snow Leopard Macbook Pro

Hi there,
I just updated Firefox and it now bounces in the dock and then stops bouncing and the little dot below disappears. I've tried restarting the machine and downloading Firefox again. There's no error message given. Does anyone have any ideas ?
Thanks,
Ben
== 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

I had the same problem. I took the advice to start in safe mode and tested out my two add-ons (Greasemonkey and AdBlock) to see which was the problem. Firefox started perfectly when I disabled Greasemonkey. Hope that helps other people with this same frustrating problem.

Firefox won't open after close.

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