Firefox will not open - disappears from Task Manager after a few seconds

Everything was working perfectly fine last night. I turn on the computer this morning, try to open firefox - nothing. I click it and there's not even an error message or anything. In the Task manager, the firefox.exe appears in the Processes tab for a couple of seconds then it just disappears. I've tried running the computer in Safe Mode to open it, still nothing. I tried the Firefox Safe Mode option, still won't open. I uninstalled, then reinstalled, that didn't help.
Any suggestions? IE works fine, but I really hate using it.

A possible cause is security software (firewall) that blocks or restricts Firefox without informing you about that, possibly after detecting changes (update) to the Firefox program. 
Remove all rules for Firefox 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. 
See:
* [[Server not found]]
* [[Firewalls]]
See also http://kb.mozillazine.org/Browser_will_not_start_up

Similar Messages

Firefox will not open,tried running profile manager but I receive a small window with the word :dialog" in it.

Firefox will not open.Tried uninstalling and reinstalling program without any success.
Tried running profile manager,but a small screen shows up with the word "dialod" in it.
Any assistance appreciated.
== User Agent ==
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; GTB0.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; InfoPath.2; .NET4.0C; Tablet PC 2.0)

Can you provide us a screenshot?
Vista/7
Go to Start and type in Snipping Tool then provide a screenshot ,save it, and upload it to any of these file uploading websites.
[http://www.imageshack.us ImageShack]
[www.mediafire.com MediaFire]
[www.kimag.es Kimages]
XP
Press '''FN + PRT SC''' on your keyboard to take a screenshot and Press '''CTRL + V''' in Paint to paste it and save it and upload it.

Firefox will not open page from a link in an email since updating windows messenger

i use microsoft outlook for email which requires Windows Messenger to make connection with my MSN account. I was forced to update Messenger. Since updating links in emails to web sites will only open my firefox homepage, and will not open the page the link is for

Anyone? I'd really like to stay with Firefox, but this problem is annoying....

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 tabs from last time

From last update on Firefox 30 it has some nasty bugs..
At first, it didn't load config from previsou version - in config I had checked to load tabs from last session.
I tried to set it again but it doesn't work and its pretty anoying to open all tabs everytime I start firefox..
Firefox 30, Ubuntu 13.10

'''https://support.mozilla.org/en-US/kb/how-to-fix-preferences-wont-save?esab=a&s=save+setting&r=6&as=s'''
How to fix preferences that won't save
This article tells you how to fix issues where Firefox can't save some or all of the settings that you try to change.

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!

Events disappear from the calendar after a few seconds

No synching, cloud, or anything, simply want to enter events and have them stay on the calendar! This is ridiculous.

I had success with this method:
1) make a backup of iCal's database (-> file menu)
2) revert to that same backup ( " " )

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

I upgraded from 3.6.13 to Beta 4.0 and now Firefox will not open at all I tried to uninstall to start again but it will not uninstall either it does nothing.

I uninstalled Beta 4 and re-installed 3.6.13 now Firefox will not open at all I tried to uninstall to start again but it will not uninstall either it does nothing, I have been using Firefox for a long time but cannot resolve this problem can anyone help and give me a solution please. As I use Firefox as my web browser it is very frustrating.
The fact it will not uninstall appears to be something completely new as nobody I know who uses Firefox has ever encountered this in the past.

Did you check your security software (firewall)?
A possible cause is security software (firewall) that blocks or restricts Firefox without informing you about that, possibly after detecting changes (update) to the Firefox program.
Remove all rules for Firefox 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.
See [[Server not found]] and [[Firewalls]] and http://kb.mozillazine.org/Firewalls
If necessary then also see:
* http://kb.mozillazine.org/Browser_will_not_start_up
* http://kb.mozillazine.org/Error_loading_websites

Firefox will not open at all. I tried to remove it from the programs to try to reinstall it but it wont let me remove it. So I tried to download again anyways and ff still wont open. My email is alicia@*****

Firefox will not open at all. I tried to remove it from the programs to try to reinstall it but it wont let me remove it. So I tried to download again anyways and ff still wont open. My email is alicia@****

Did you check your security software (firewall)?
A possible cause is security software (firewall) that blocks or restricts Firefox without informing you about that, possibly after detecting changes (update) to the Firefox program.
Remove all rules for Firefox 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.
See [[Server not found]] and [[Firewalls]] and http://kb.mozillazine.org/Firewalls
If necessary then also see:
* http://kb.mozillazine.org/Browser_will_not_start_up
* http://kb.mozillazine.org/Error_loading_websites

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 w/ not open forms from websites. Internet Explorer had no problem. Re-installed FF with no resolution.

Firefox will not open forms (i.e. registration forms, class schedule, flyer, etc.) on certain websites. Updated Adobe Reader and Re-installed and updated FF. Still will not open the forms. Tried Internet Explorer with no problem at all. Tried FF on a different computer w/ no problem. Help please?

I also have this problem. I cannot open links from a discussion board I frequent nor can I open links from my email. Also after opening my email, I cannot go to any other sites except my home page. I can then go no where else.
When I close Firefox and try to reopen it, it does nothing! I have to bring up the Task Manager and end the Firefox process before I can get back in.
To the best of my knowledge, this problem started with the new update to Ver. 3.6.9. I am running Windows XP Media Center 2005

Firefox will not open at all, no matter how many times I click it.

Firefox will not open at all. I have tried troubleshooting, I have tried right clicking it and clicking "Run As Administrator", and I have tried uninstalling and reinstalling it. When i try open it, it does not come up with any error messages or anything. The loading icon appears then disappears, without firefox opening. Nothing I try opens firefox.

You can
1. Kill firefox.exe through the Task Manager, to open the taskmanager hit Win + R and enter taskmgr.exe in the window, hit enter, right click firefox.exe and hit "end all processes" or something similar.
OR
2. Boot into safe mode '''with networking''' and delete the Firefox install folder said above.
See: http://www.bleepingcomputer.com/tutorials/how-to-start-windows-in-safe-mode/ 
For Windows 8: http://www.intowindows.com/shortcut-key-to-boot-into-the-hidden-safe-mode-in-windows-8/

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.

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 - disappears from Task Manager after a few seconds

Similar Messages

Maybe you are looking for