X
Tap here to go to the mobile version of the site.

Support Forum

I've tried everything--Firefox simply won't open. I opened the troubleshoot articles, but none of the fixes did the trick?

Posted

Firefox will not open. I tried every single troubleshoot recommendation, and it still won't work. I thought it may be under the "corrupt profile data" troubleshoot article, but when I followed the recommendations to change to a new profile, the profile manager would not open or run on my computer--as if it never existed. I tried downloading a different browser, and as soon as I imported my firefox data, it started misbehaving in the exact same way.

This is getting extremely frustrating. Anybody know what to do?


Comment by a forum moderator

See list of helpful information and links in my post under HERE

Firefox will not open. I tried every single troubleshoot recommendation, and it still won't work. I thought it may be under the "corrupt profile data" troubleshoot article, but when I followed the recommendations to change to a new profile, the profile manager would not open or run on my computer--as if it never existed. I tried downloading a different browser, and as soon as I imported my firefox data, it started misbehaving in the exact same way. This is getting extremely frustrating. Anybody know what to do? ------ Comment by a forum moderator ===See list of helpful information and links in my post under [/questions/964132?page=2#answer-477049 HERE] ===

Modified by John99

Additional System Details

Installed Plug-ins

  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • Shockwave Flash 10.3 r183
  • RealPlayer(tm) LiveConnect-Enabled Plug-In
  • RealPlayer Download Plugin
  • Adobe PDF Plug-In For Firefox and Netscape 11.0.03
  • Next Generation Java Plug-in 10.21.2 for Mozilla browsers
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • iTunes Detector Plug-in
  • Adobe Shockwave for Director Netscape plug-in, version 12.0.2.122
  • RealNetworks(tm) RealDownloader Chrome Background Extension Plug-In
  • RealNetworks(tm) RealDownloader PepperFlashVideoShim Plug-In
  • RealNetworks(tm) RealDownloader HTML5VideoShim Plug-In
  • RealDownloader Plugin
  • 5.1.20125.0
  • NPWLPG
  • McAfee MSC FF plugin DLL
  • McAfee Virtual Technician plugin for Mozilla (Gecko Version: 1.8b1)
  • CANON iMAGE GATEWAY Album Plugin Utility Module
  • The Hulu Desktop Plugin allows Hulu.com to integrate with the Hulu Desktop application.

Application

  • User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:22.0) Gecko/20100101 Firefox/22.0

More Information

John99 971 solutions 13138 answers

That is three of you now very recently who have posted in this thread belonging to someone else but have not started your own question.

  1. Read this thread and follow the links to articles, does any of that advice help you and solve the problem ?
  2. Please then start your own thread using /questions/new if your problem

is unresolved.

  1. Normally I would say to follow the troubleshooting steps and include full system information from Firefox's troubleshooting information. Or the extension provided as you commence with the quesetion asking. Those prompts may not all be totally applicable if Firefox will not start but do your best.
  2. Post back in in this thread to confirm when you have done so and we will be able to find your answers.
That is three of you now very recently who have posted in this thread belonging to someone else but have not started your own question. # Read this thread and follow the links to articles, does any of that advice help you and solve the problem ? # Please then start your own thread using [/questions/new] if your problem is unresolved. #Normally I would say to follow the troubleshooting steps and include full system information from Firefox's troubleshooting information. Or the extension provided as you commence with the quesetion asking. Those prompts may not all be totally applicable if Firefox will not start but do your best. #Post back in in this thread to confirm when you have done so and we will be able to find your answers.
John99 971 solutions 13138 answers

eccotten,

  • Presumably Firefox continues to work in Windows safe mode with networking.
  • Did you try the clean reinstall involving deletion of the Firefox program files?

Here is another method of getting a type of Firefox working. Use the unofficial Firefox Portable. Install it as an additional browser.

eccotten, *Presumably Firefox continues to work in Windows safe mode with networking. *Did you try the clean reinstall involving deletion of the Firefox program files? Here is another method of getting a type of Firefox working. Use the unofficial Firefox Portable. Install it as an additional browser. * Download and find install instructions from <br /> http://portableapps.com/apps/internet/firefox_portable
darellen 0 solutions 5 answers

I have managed to get my firefox working again by using 'Malwarebytes' it didn't have any effect first time when i tried all the listed fixes but after a second clean install and using that it now works. i have about a 10 second delay before it actually starts but other than that it's fine.

and as far as starting a new thread, have you seen how many threads are on here with the same problem??? if i start a new thread it will fill up with the same possible solutions as in every other thread.

I have managed to get my firefox working again by using 'Malwarebytes' it didn't have any effect first time when i tried all the listed fixes but after a second clean install and using that it now works. i have about a 10 second delay before it actually starts but other than that it's fine. and as far as starting a new thread, have you seen how many threads are on here with the same problem??? if i start a new thread it will fill up with the same possible solutions as in every other thread.
John99 971 solutions 13138 answers

darellen,
We are trying to prevent threads filling with me toos and unrelated posts !

Scanning for malware with multiple tools was already suggested on the first page of this thread. (Although malware may often slow down Firefox rather than prevents it working, because possibly malware may take advantage of a functioning firefox)

Now may be a good time to remind people to turn on telemetry to help Firefox developers.

We have KB articles and canned responses that cover most solutions. But the causes often differ even if the symptom is the same. It is much better and suggested in the forum guidelines to start your own thread.

  • That way we can address an individual user's problem.
  • Sometimes the problem is a new and specific cause.
  • Almost always the fault is with the particular setup and so the additional information provided in a new thread can be invaluable.

You obviously had a malware problem. You probably have a slow startup time but I am not sure which of the myriad of stats actually report the startup results averages for all users.

See also

darellen,<br /> We are trying to prevent threads filling with ''me toos'' and unrelated posts ! Scanning for malware with multiple tools was already suggested on the first page of this thread. (Although malware may often slow down Firefox rather than prevents it working, because possibly malware may take advantage of a functioning firefox) Now may be a good time to remind people to turn on telemetry to help Firefox developers. *[[Send performance data to Mozilla to help improve Firefox]] We have KB articles and canned responses that cover most solutions. But the causes often differ even if the symptom is the same. It is much better and suggested in the forum [[Forum rules and guidelines|guidelines]] to start your own thread. * That way we can address an individual user's problem. * Sometimes the problem is a new and specific cause. * Almost always the fault is with the particular setup and so the additional information provided in a new thread can be invaluable. You obviously had a malware problem. You probably have a slow startup time but I am not sure which of the myriad of stats actually report the startup results averages for all users. See also * [[Firefox takes a long time to start up]]
cor-el
  • Top 10 Contributor
  • Moderator
17415 solutions 157316 answers

You can use one of these to start Firefox in Safe Mode:

  • On Windows, hold down the Shift key while starting Firefox with a double-click on the Firefox desktop shortcut
  • On Mac, hold down the Options key while starting Firefox
  • Help > Restart with Add-ons Disabled

You can use the MSConfig program or the Autoruns utility to see which software and services are getting started (be cautious with disabling services).

You can use one of these to start Firefox in <u>Safe Mode</u>: *On Windows, hold down the Shift key while starting Firefox with a double-click on the Firefox desktop shortcut *On Mac, hold down the Options key while starting Firefox *Help > Restart with Add-ons Disabled *https://support.mozilla.org/kb/Safe+Mode *https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes You can use the MSConfig program or the Autoruns utility to see which software and services are getting started (be cautious with disabling services). *http://technet.microsoft.com/en-us/sysinternals/bb963902.aspx
BAOTAIMO 0 solutions 5 answers

Helpful Reply

if you're running xp just change the value of SynAttackProtect to 0, or you can just delete it you need to navigate the registry to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters voila! hope this would help you

if you're running xp just change the value of SynAttackProtect to 0, or you can just delete it you need to navigate the registry to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters voila! hope this would help you
John99 971 solutions 13138 answers

Reyter, (and Everyone else)
I will repeat my advice.

  1. Please read the suggestions within this thread
  2. If the problem persists please start a new thread of your own by asking a question.
  • For this specific type of problem only please use this quick direct shortcut to start a question of your own HERE

I have no reason to expect any new version of Firefox will help you. You need to take action yourself to identify and fix this. We can offer advice but it is your choice whether to follow it or stick with a broken Firefox.

Reyter, (and Everyone else) <br /> I will repeat my advice. #Please read the suggestions within this thread #If the problem persists please start a new thread of your own by asking a question. * For this specific type of problem '''only''' please use this '''quick direct shortcut''' to start a question of your own [https://support.mozilla.org/en-US/questions/new/desktop/fix-problems/form?search=Firefox+notstarting+%28see+%2Fquestions%2F964132+%29&step=aaq-question HERE] I have no reason to expect any new version of Firefox will help you. You need to take action yourself to identify and fix this. We can offer advice but it is your choice whether to follow it or stick with a broken Firefox.
BAOTAIMO 0 solutions 5 answers

Comments from a forum moderator

  • Take extreme care with editing the Registry.Many of you will have no need to even consider a registry edit. EDITS COULD PREVENT THE COMPUTER FROM WORKING. ~J99


in registry, navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters

try to delete SynAttackProtect

then restart your pc

Comments from a forum moderator * Take extreme care with editing the Registry.Many of you will have no need to even consider a registry edit. EDITS COULD PREVENT THE COMPUTER FROM WORKING. ~J99 ------ in registry, navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters try to delete SynAttackProtect then restart your pc

Modified by John99

John99 971 solutions 13138 answers

This thread is contains posts by others claiming to have the same problem and asking for a solution, whereas in reality they my have the same symptom but need a different solution.

Note if Firefox does not run in Firfefox's safe mode but does run in Windows Safe mode the problem is probably not with the Firefox profile. It is more likely to be with some third party software, that may or may not involve Firefox plugins.

In such circumstances it is unlikely any of these will work

  • simply uninstalling and re-installingFirefox
  • deleting or changing Firefox profiles
  • waiting for a Firefox update

The problem could be security related software or malware. By all means scroll the thread and read the other suggestions,but do not expect to get a proper solution to your own problem by asking in someonelse's thread.

If you need a solution and have read the thread use this special direct and quick shortcut to start your own thread.


Also see

edit added point about IE default ~J99

This thread is contains posts by others claiming to have the same problem and asking for a solution, whereas in reality they my have the same symptom but need a different solution. Note if Firefox does not run in Firfefox's safe mode but does run in Windows Safe mode the problem is probably not with the Firefox profile. It is more likely to be with some third party software, that may or may not involve Firefox plugins. In such circumstances it is unlikely any of these will work * simply uninstalling and re-installingFirefox * deleting or changing Firefox profiles * waiting for a Firefox update The problem could be security related software or malware. By all means scroll the thread and read the other suggestions,but do not expect to get a proper solution to your own problem by asking in someonelse's thread. If you need a solution and have read the thread use this '''special''' direct and''' quick ''' [https://support.mozilla.org/en-US/questions/new/desktop/fix-problems/form?search=Firefox+will+not+open+or+won%27t+start+%28see+%2Fquestions%2F964132+%29+&step=aaq-question shortcut] to start your own thread. ---- Also see *[[Troubleshoot Firefox issues using Safe Mode]] * WINDOWS safe-mode (F8 key) http://windows.microsoft.com/en-us/windows/start-computer-safe-mode#start-computer-safe-mode=windows-vista * [[Firefox won't start - find solutions]] *[[Firefox takes a long time to start up]] *[[Configure firewalls so that Firefox can access the Internet]] **[[Configure Windows Firewall to allow Firefox access to the Internet]] *[[Troubleshoot Firefox issues caused by malware]] *Also note in the interim make some other browser the default browser whether you are changing or not http://windows.microsoft.com/en-GB/internet-explorer/make-ie-default-browser#ie=ie-10 <sub>edit added point about IE default ~J99 </sub>

Modified by John99

John99 971 solutions 13138 answers

ecotten,

We have not heard from you for a while.

Did you give up on Firefox?

Is Firefox still working in Windows Safe Mode but not in Firefox safe mode?

Obviously Windows safe mode is a diagnostic mode intended to help track down problems caused by additional software. It is not intended for day to day use with a browser.

ecotten, We have not heard from you for a while. Did you give up on Firefox? Is Firefox still working in Windows Safe Mode but not in Firefox safe mode? Obviously Windows safe mode is a diagnostic mode intended to help track down problems caused by additional software. It is not intended for day to day use with a browser.
mikesdebp 0 solutions 1 answers

Helpful Reply

Bye Bye Firefox

This is clearly a Firefox problem and they don't seem to be able to fix it. All those proposed solutions above are band-aids! The other popular browsers like IE and Chrome work OK for me in windows 7...

I really like Firefox but I'm not counting on this being fixed in the near future. I've switched to IE

Bye Bye Firefox This is clearly a Firefox problem and they don't seem to be able to fix it. All those proposed solutions above are band-aids! The other popular browsers like IE and Chrome work OK for me in windows 7... I really like Firefox but I'm not counting on this being fixed in the near future. I've switched to IE
John99 971 solutions 13138 answers

mikesdebbp

This is clearly a Firefox problem 

It is more likely a problem on your machine or setup. Good luck with IE


Firefox has nearly 1/2 Billion users. I see no indication that many have such a problem with Firefox not starting. Even if it works for 99.99% and (1/10th) 00.001% have a problem with it not starting; that affects thousands of potential users.


If you need a solution and have read the thread use this special direct and quick shortcut to start your own thread.

mikesdebbp This is clearly a Firefox problem It is more likely a problem on your machine or setup. Good luck with IE -------------- Firefox has nearly 1/2 Billion users. I see no indication that many have such a problem with Firefox not starting. Even if it works for 99.99% and (1/10th) 00.001% have a problem with it not starting; that affects thousands of potential users. *You need to help yourselves. *Also note in the interim make some other browser the default browser whether you are changing or not http://windows.microsoft.com/en-GB/internet-explorer/make-ie-default-browser#ie=ie-10 *You do need a working browser. **So the easy option is to change, if you are not willing; or able; to help. ** If you change see also [[Export Firefox bookmarks to an HTML file to back up or transfer bookmarks]] and [[Export bookmarks to Internet Explorer]] *Me too posts do not help in tracking down that sort of problem. * Finding the differences and critical factors for that minority should help yourself, and then benefit others with similar problems. ----- If you need a solution and have read the thread use this special direct and quick [https://support.mozilla.org/en-US/questions/new/desktop/fix-problems/form?search=Firefox+will+not+open+or+won%27t+start+%28see+%2Fquestions%2F964132+%29+&step=aaq-question shortcut] to start your own thread.

Modified by John99

Scarmander 0 solutions 1 answers

In case anyone else is having this problem, I was, but I disabled Windows Defender and that fixed it straight away. Hope that helps!

In case anyone else is having this problem, I was, but I disabled Windows Defender and that fixed it straight away. Hope that helps!
georgee 0 solutions 8 answers

Problem Solved!

My Firefox now opens.

I have had the same issues and tried everything that is suggested here. I could only open Firefox when my computer was started in safe mode.

I managed to get Firefox running again after running ‘Spybot – Search & Destroy’ on my PC. It found a lot of things which I removed. However, I couldn't remove one program 'Babylon Toolbar' without right clicking on the Spybot desktop icon and selecting 'run as administrator'. I restarted my PC, it scanned and then I clicked on 'search and destroy' to remove the software. Straight away Firefox reopened.

I also used MozBackup to back up both my Firefox and Thunderbird profiles and settings etc.

I hope that is of help as I know how frustrating it is and I much prefer to use Firefox than other browsers. I was very close to switching to Chrome!

Problem Solved! My Firefox now opens. I have had the same issues and tried everything that is suggested here. I could only open Firefox when my computer was started in safe mode. I managed to get Firefox running again after running ‘Spybot – Search & Destroy’ on my PC. It found a lot of things which I removed. However, I couldn't remove one program 'Babylon Toolbar' without right clicking on the Spybot desktop icon and selecting 'run as administrator'. I restarted my PC, it scanned and then I clicked on 'search and destroy' to remove the software. Straight away Firefox reopened. I also used MozBackup to back up both my Firefox and Thunderbird profiles and settings etc. I hope that is of help as I know how frustrating it is and I much prefer to use Firefox than other browsers. I was very close to switching to Chrome!
DaveI 0 solutions 1 answers

Hi everyone. I had the same problem today (yesterday! it's now 3.25). The problem started out of the blue and Firefox just wouldn't launch. I tried all the things suggested- reinstalling, creating a new profile, clean reinstall, ran a virus check etc. Someone wrote to check for Firefox already running in the processes of task manager so I checked and it wasn't there. BUT I did notice something running called BitGuard. Checked it out online and no-one seemed to know what it was. I uninstalled it and, hey presto, up and running. I don't know if this is the same for others of you out there but I hope it helps. I've had a REALLY frustrating day!

Hi everyone. I had the same problem today (yesterday! it's now 3.25). The problem started out of the blue and Firefox just wouldn't launch. I tried all the things suggested- reinstalling, creating a new profile, clean reinstall, ran a virus check etc. Someone wrote to check for Firefox already running in the processes of task manager so I checked and it wasn't there. BUT I did notice something running called BitGuard. Checked it out online and no-one seemed to know what it was. I uninstalled it and, hey presto, up and running. I don't know if this is the same for others of you out there but I hope it helps. I've had a REALLY frustrating day!
cor-el
  • Top 10 Contributor
  • Moderator
17415 solutions 157316 answers
*http://filedennis.wordpress.com/2013/09/16/what-is-bitguard-exe-and-bitguard-dll/ *http://windowfdb.com/q.php?q=bitguard-dll-c-programdata-bitguard-2-6-1673-238-c16c1ccb-7046-4e5c-ct *[[/questions/971256]]

Modified by cor-el