Firefox will not open on my computer

From sometime last night to today (11/18) Firefox will not open when I click on the shortcut link from my desktop. I've tried to add another profile by clicking on start/run/firefox.exe but that doesn't even work. What would be the next step?

Do any error messages display when attempting to open Firefox? 
In the task manager, is the <code>firefox.exe</code> process running?
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.
#Now, go ahead and reinstall Firefox:
##Double-click the downloaded installation file and go through the steps of the installation wizard.
##Once the wizard is finished, choose to directly open Firefox after clicking the Finish button.
Please report back soon.

Similar Messages

Firefox will not open on my computer the majority of the time. If I shut down and restart it will work sometimes, but not always. This started recently in the last two weeks. Today is June 12th 2011.

Firefox will not open on my computer the majority of the time. If I shut down and restart it will work sometimes, but not always. This started recently in the last two weeks. Today is June 12th 2011.

See:
* http://kb.mozillazine.org/Browser_will_not_start_up

Firefox will not open without restarting computer

I do not shut down my computer as we use "Log Me In" so I and another person can log in from wherever we want, anytime. About 5 months ago the problem started. I can open FF when I come in every morning, but when I come back in the afternoon or later in the evening, Firefox will NOT open.. It does nothing.. I can click to open, use the drop down and select open, nothing happens. I have to restart my computer every afternoon in order to get Firfox to open.. So I have begun transferring all my links to IE as it does not have any problme like that.

Your plugins list shows outdated plugin(s) with known security and stability risks.
* Shockwave Flash 10.0 r45
* Java Plug-in 1.6.0_05 for Netscape Navigator (DLL Helper)
Update the [[Java]] plugin to the latest version.
*http://java.sun.com/javase/downloads/index.jsp (Java Platform: Download JRE)
Update the [[Flash]] plugin to the latest version.
*http://www.adobe.com/software/flash/about/

Firefox will not open on my computer, even after reinstall. Please help?

I've been using Firefox for a long time and it's been working well. I'm on acer Windows 7. However now it will not open even when I try to run "C:\Program Files\Mozilla Firefox\firefox.exe". Chrome or Internet Explorer work fine. I also reinstalled Firefox and it still doesn't work.
Here's the id of my latest crash (from 30.4.2014): bp-4e981129-aea6-4b23-87a2-739b42140430
Thank you for any help with fixing this.

Create a new profile as a test to check if your current profile is causing the problems.
See "Creating a profile":
*https://support.mozilla.org/kb/profile-manager-create-and-remove-firefox-profiles
*http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Profile_issues
Profile Backup and Restore
*http://kb.mozillazine.org/Profile_backup
*https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles
*http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

Firefox will not open on my computer, even after reinstall, with no error message or when I try to run "C:\Program Files\Mozilla Firefox\firefox.exe" -p. Help?

I recently installed firefox so I could use an adblocker. It installed just fine, and it worked just fine for about three days. Then yesterday it stopped opening. I'm on a Toshiba running Windows 7. The icon highlights when I click on it, but then it stops and won't open the browser at all. When I try to run it with the manual command "C:\Program Files\Mozilla Firefox\firefox.exe" -p, I get the error message, "C:\Program Files\Mozilla Firefox\ refers to a location that is unavailable. It could be on a hard drive on this computer, or on a network. Check to make sure that the disk is properly inserted, or that you are connected to the Internet or your network, and then try again. If it still cannot be located, the information might have been moved to a different location." I installed it to that location, and I don't need a disk. I'm connected to the Internet just fine and my other browsers (Chrome and IE) work the same as always. But they're swamped with ads and I really was happy wih Firefox when it was opening...how can I fix this issue?

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.
#Now, go ahead and reinstall Firefox:
##Double-click the downloaded installation file and go through the steps of the installation wizard.
##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 will not open on my laptop computer,It is my designated server but will not open???? Any ides why?

Firefox will not open on my lap top

No, nothing at all happens. Once clicked the 'circle' that suggest it is loading appears (if that makes sense) but no, nothing
Many thanks.
Can you check something for me please?
Restart your PC. after the PC restarts, bring up your Task manager, and go to the "Processes" tab. Click "Image name" to sort the processes alphabetically.
Now try to launch iTunes.
Does an itunes.exe process appear? If so, does it vanish after a second or so, or does it persist in the Processes tab (even though iTunes itself never shows up)?

Firefox will not open. Hangs at "connecting" stage. Non-responsive even to process shut-down via task manager.

Starting yesterday, Firefox will not open at all. It hangs at the "connecting stage." For hours. It will not shut down even using the task manager for applications or processes, and it locks up virtually every other application. I thought I managed to save an open Word document yesterday - it looked like a slow, but normal save during the Firefox hang, but the document was empty when I restarted my computer.
Even though my machine is not pentium 4 based, I tried starting using the Windows XP/M configuration, I downloaded and re-installed (over the top of) the existing version, I verified that no Mozilla processes were running before trying to start Mozilla, and tried creating a new profile. Absolutely no success. Every time (of the dozens) I have tried to start Firefox I have had to force a hard shut-down to get out of the application. I have now unpinned Firefox from my task bar because I keep forgetting and hitting it by reflex.
I am running version 11.0 (at least that is what I just downloaded - I am not positive what I was running yesterday). My system is Windows 7 Home Premium, Intel Core i3, 2.4 gHz, 4 GB RAM, 64 bit OS.
Next option is to restore to a previous version. If that doesn't work, I will uninstall and start over from scratch.

A possible cause is security software (firewall) that blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.
Remove all rules for Firefox and the plugin-container from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox and the plugin-container process and the updater process.
See:
*https://support.mozilla.org/kb/Server+not+found
*https://support.mozilla.org/kb/Firewalls
*http://kb.mozillazine.org/Browser_will_not_start_up

Firefox will not open unless I run it in compatibility mode (Windows XP SP 3), run it as an administrator, or launch it immediately after a reinstall (the reinstall thing only works once.) How do I fix this?

This morning, Firefox crashed. After this, when I click the Firefox icon, the hourglass appears and then nothing happens. Firefox does briefly appear in the task manager when I do this.
I tried rebooting. I tried reinstalling multiple times. (Firefox will run when I select "Launch Firefox" from the installer. Then the problem occurs again.) I tried safe mode. I have found that Firefox will work if I select Windows XP compatibility mode from the icon properties menu or if I run the program as an administrator. When I do this, Windows asks me if I want a program to be able to make changes to my computer.
I have noticed that a Windows Error Report is being generated each time Firefox will not open.

A possible cause is security software (firewall,anti-virus) that blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.
Remove all rules for Firefox and the plugin-container from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox and the plugin-container process and the updater process.
See:
*https://support.mozilla.org/kb/Server+not+found
*https://support.mozilla.org/kb/Firewalls

Firefox will not open at all. I only get the Mozilla Crash Reporter over and over.

After updating yesterday, Firefox will not open. I repeatedly get the Mozilla Crash Reporter. I've scanned my computer for malware, I've tried to open it in safe mode (it won't), I've completely uninstalled and reinstalled Mozilla, but nothing works. Each time I reinstall, I still get the Mozilla Crash Reporter. The program will not open at all.
I ran my crash ID. Here is the info: bp-eff196eb-ed21-45ee-83c6-e0fc42130123

hello, this crash is caused by Websense Endpoint security software that is running on the system. please try to install all the updates for this program that are available...

Firefox will not open up after i restored to default settings

i recently restored firefox to default settings on my profile on windows xp computer now firefox will not load on my profile but does on my fathers profile.whats up???????????

Hi jonbeme,
Thank you for your question. I understand after you reset Firefox, that Firefox will not open up on one of the accounts on this computer.
This is what happens when Firefox is Reset [https://support.mozilla.org/en-US/kb/reset-firefox-easily-fix-most-problems].
To test to see if the problem is the profile, use the Profile Manager to create a new profile. [[Use the Profile Manager to create and remove Firefox profiles]] If the problem goes away, you can then move your bookmarks and other important settings into the new profile.

Firefox will not open at all. Google Chrome main browser.

Google Chrome my main web browser with Comcast as home page.
Now Firefox will not open at all. What do I do. Delete Firefox and reinstall is what I think?

Yes, i would try reinstalling Firefox first.
A few other basic trouble shooting things you can try is this:
Run all Windows Updates, install all needed service packs, etc.
Update your graphics driver (Firefox uses your graphics card for some rendering, and an out of date graphics card driver can cause problems. [[Upgrade your graphics drivers to use hardware acceleration and WebGL]]
Update all your plugins (Flash, Java, etc.): [http://www.mozilla.org/plugincheck/ http://www.mozilla.org/plugincheck/].
Download and Install MalwareBytes Anti-Malware, run a full Scan. [http://www.malwarebytes.org/ http://www.malwarebytes.org/]. This helps check that there are no viruses on your computer causing issues. You can uninstall this program after you clean off any infections.

Firefox will not open or won't start (see /questions/964132 )

was Ok till recently

Please include more information, such as your Operating System (Windows?) and version, plus exactly what happens when you try to start Firefox. The information that's listed in a recent Firefox crash report, if available, might also help. See [[Firefox crashes]] under '''Get help fixing this crash''' and post any crash Report IDs recently submitted (they'll start with '''bp-''' )
Your question title says "Firefox will not open or won't start (see /questions/964132 )" I looked at that question and it was started by another Firefox user. [/questions/964132?page=2#answer-477049] has a number of suggestions if Firefox won't start. Which ones did you try?
For other possible solutions see
* [[Basic Troubleshooting]]
* http://kb.mozillazine.org/Browser_will_not_start_up
*[/questions/958850] ''Firefox won't open after restart''
Note: A "clean reinstall" was one of the suggestions in [/questions/964132]. It means removing the Firefox application files and then reinstalling Firefox from a fresh download, as explained in the "Reinstall Firefox" step in [[Basic Troubleshooting]]. If that allows you to start Firefox, but if the problem returns after restarting the computer, you should do another "clean reinstall" and then troubleshoot your plugins by disabling all of them, as suggested in the [[Basic Troubleshooting]] article.

Firefox will not open...please help.

My Mozilla Firefox will not open any windows, although it does start and show as running in my task manager. I have uninstalled and reinstalled it twice now and restarted my computer twice.
I CANNOT start Firefox in safe mode by holding down shift or using the "firefox/safe" in the run box.
I've tried it with applications closed, and open....I've tried it online and offline, I tried to run it in compatibility mode, I checked my computer for viruses...nothing helps.
I have read every troubleshooting item here but they only say try safe mode, or do something from Firefox when it is open such as reset it. I have no add-ons or extensions on Firefox and it just worked yesterday...also my computer is brand new Windows 8.1 12GB ram 2TB harddrive and everything else works fine.
please help

Hello,
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.
#Now, go ahead and reinstall Firefox:
##Double-click the downloaded installation file and go through the steps of the installation wizard.
##Once the wizard is finished, choose to directly open Firefox after clicking the Finish button.
Please report back to see if this helped you!
Thank you.

WARNING: Do not run Firefox's uninstaller or use a third party remover as part of this process, because that could permanently delete your Firefox data, including but not limited to, extensions, cache, cookies, bookmarks, personal settings and saved passwords. These cannot be recovered unless they have been backed up to an external device!

Firefox will not open, it gives me this cod and would not turn off, Error on switching in renew: NS_ERROR_UNEXPECTED, Component returned failure code: 0x8000ffff (NS_ERROR_UNEXPECTED) [nsIPrefBranch.getCharPref] id: none

I restored my computer to earlier time and I did an other restore but to latest time and since then every time I click on Firefox short cut this window comes up with the same cod and I can not turn it off unless turn off or restart my laptop, I did delete the Firefox few times and reinstalled it but did not change anything, still I get the same cod,
Error on switching in renew:
NS_ERROR_UNEXPECTED, Component returned failure code: 0x8000ffff (NS_ERROR_UNEXPECTED) [nsIPrefBranch.getCharPref]
id: none

Some how I solved my problem by opening a user account and downloading Firefox 4.0 beta and installing it, I did try it, worked fine, so I did close the user account and did go back to my own account(switched user), the main page that I had problem with Firefox which would not open, I dabble click on Firefox it start working again!! I hope that solves your problem too.
firefox will not open, it gives me this cod and would not turn off, Error on switching in renew: NS_ERROR_UNEXPECTED, Component returned failure code: 0x8000ffff (NS_ERROR_UNEXPECTED) [nsIPrefBranch.getCharPref] id: none

Firefox will not open. Unable to uninstall because message says Firefox is running. How do I turn it off?

I upgraded Firefox after upgrading to windows 8.1 now firefox will not open but when I try to uninstall the program I get a popup telling me to close firefox. The task manager says nothing is running. Help.

Try restart your computer then try unistall, then get the most recent version here:
*[http://www.mozilla.org/en-US/firefox/all/ Last Firefox]
*[https://support.mozilla.org/en-US/kb/install-firefox-windows Install Firefox]
Also:
*[https://support.mozilla.org/en-US/kb/uninstall-firefox-from-your-computer Uninstall Firefox]

Firefox will not open on my computer

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