Firefox hangs upon startup

When I try to start firefox it does nothing. Via CLI it does the same - nothing. It just sits there and appears to be hung up. No pid, nada.
Deleted ~/.mozilla and tried to run firefox -profilemanager. Same thing, just hangs.
Tried to run firefox -v just to see if it return the version -no joy. Hangs.
no locks present and did a killall firefox before each attempt.
Uninstalled via yum and reinstalled via yum. Same.
Is there a log file I can view to try to determine whats hanging upon startup?
Thanks in advance for your help.

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).
 To Enable SafeMode 
*You can open Firefox 4.0+ in Safe Mode by holding the '''Shift''' key when you open the Firefox desktop or Start menu shortcut.
* Or open the Help menu and click on the '''Restart with Add-ons Disabled...''' menu item while Firefox is running.
*''Once you get the pop-up, just select "'Start in Safe Mode"''
If it works in Safe Mode and in normal mode with all extensions (Tools > Add-ons > Extensions) disabled then try to find which extension is causing it by enabling one extension at a time until the problem reappears.
Close and restart Firefox after each change via "Firefox > Exit" (Windows: Firefox/File > Exit; Mac: "Firefox > Quit Firefox"; Linux: "Firefox/File > Quit")
*https://support.mozilla.org/kb/Safe+Mode
*https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

Similar Messages

Firefox hangs upon startup, or starts a process but doesn't open the browser.

Within the last couple days, Firefox has had a lot of problems.
When I open it, the window hangs and freezes after a few seconds, if it opens at all. Other times, trying to open Firefox simply won't open the window, but will leave an extra process running in the background that I have to manually shut down via Task Manager.
I have made a fresh profile. I have restarted Firefox. I previously had hardware acceleration checked, and disabled it; still having the same problem. I have uninstalled and re-installed Firefox multiple times. I have run a scan of my system with Malwarebytes; nothing detected. It's not even generating a crash log. I have looked through the support forums, found people with problems similar to mine, but no solutions posted for them since sometime last month.
Firefox seems to run normally if do an install of version 21, which opens up the browser window. Everything works fine, until I close the browser and then re-open it.

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).
 To Enable SafeMode 
*You can open Firefox 4.0+ in Safe Mode by holding the '''Shift''' key when you open the Firefox desktop or Start menu shortcut.
* Or open the Help menu and click on the '''Restart with Add-ons Disabled...''' menu item while Firefox is running.
*''Once you get the pop-up, just select "'Start in Safe Mode"''
If it works in Safe Mode and in normal mode with all extensions (Tools > Add-ons > Extensions) disabled then try to find which extension is causing it by enabling one extension at a time until the problem reappears.
Close and restart Firefox after each change via "Firefox > Exit" (Windows: Firefox/File > Exit; Mac: "Firefox > Quit Firefox"; Linux: "Firefox/File > Quit")
*https://support.mozilla.org/kb/Safe+Mode
*https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

Firefox stopped working and hangs upon startup

First, a problem with iTunes - could not access the iTunes store. Uninstalled iTunes and re-installed, then Firefox hung up, had to close with Task Manager. After that Firefox hangs on startup. Have uninstalled and re-installed Firefox, still hangs on startup. Using Windows 7 OS.

Firefox will not load to start in safe mode - it is just a blank white screen with no radio buttons or icons on it and the circling icon for loading.
I deleted my old profile and uninstalled Firfox and tried downloading again, but the same problem exists. I am currently using IE as my browser, but prefered Firefox (when it worked). It seems the new version is the problem.

Firefox hangs on startup in normal mode and safe mode, won't start in reset mode

using FF 26.0
using windows 7 home premium v 6.1 (latest)
My problems started after loading FF 26.0. If I start FF in regular mode it hangs. Same thing happens when I start in safe mode. I can shut FF down (while it is hung) by clicking the X in the top right corner.
When I start FF in safe mode and choose reset FF, it hangs without FF ever appearing; I have to shut it down using task manager. After shutting down in reset mode, I can start FF in regular mode and everything works fine. However, stopping FF does not shut it down. I have to use task manager to shut it down. Then I am back to square one when trying to start FF, i.e. reset firefox, hangs, task manager shut down, then start FF.
When FF is running, I can open a new FF window.All my addons are up to date. I have reinstalled FF 26.0, three or four times.
I have cleared cache and cookies.
I have scanned for viruses and rootkits etc. with microsoft security essentials and spybot.
I have been a happy user of FF for more than a decade and have never had a problem like this. Any help will be appreciated.
Thanks!

There has been an issue reported with a snippet on the about:home page.
See [[/questions/984193#answer-525530]]

LR4 Hanging Upon Startup in Win7 - Application Un-useable

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Update: Tried loading LR4.1 RC. No change - program still freezing or hangs when I first open program.

Firefox hangs on startup (even in safe-mode) and no sessionstore.js file to edit.

After a system restart due to Firefox seeming to act strangely, it hangs as soon as I open it. The tab says "Connecting..." but it eventually just stops responding.
Safe-mode doesn't work either, but private browsing is okay (which obviously I'd rather not use primarily.)
I had a few tabs open and I suspect one of them might be a pain for session restore to open, so I figured I would go try to snag it from the sessionstore.js but unfortunately I apparently don't have one.
I tried enabling the "ask before restoring tabs" feature but that didn't help either.

'''Edit: I used private browsing to change the settings to open a blank page on startup and it worked perfectly. Thank you so much! :)'''
Thanks for the quick reply!
Will changing that setting work from either private browsing or another profile? Because my default profile just freezes instantly, can't even get to options. :/
The URL I thought might be causing problems was http://brennadaugherty.tumblr.com/ ... I have no idea why it would. I also had http://brennahaspixels.tumblr.com/ open and since that has tons of little images on it that seems more likely but the problem started with that first URL.
I actually started a new profile and transferred everything else over to it and it works fine, but it would be nice to figure out what happened to the first. :/

Firefox hangs upon pressing a Browse... button in a file upload form

Firefox consistently hangs when you press the Browse... button on a form to upload a file.
This affects one single user account.
The problem occurs even in new firefox profiles.
Other users on this computer are not affected.

Maybe a problem with the MRU keys in the Windows registry.
You can try to delete the MRU (Most Recently Used) ComDlg32 registry keys with the regedit.exe program.
Navigate to: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\ComDlg32
Delete the subkeys (LastVisitedMRU and OpenSaveMRU).
Be careful with editing the registry as there is no Undo possible: all changes are applied immediately.
You can export key(s) before making changes.

Firefox crashes upon startup after update to new version and download attempt

I was asked to update to a new version of Firefox, and when I responded positively to something like, "Do you want to run Firefox now?" it crashed immediately. When I tried to launch it from the desktop it crashed immediately. When I launched it holding down the shift key it brought up Internet Explorer, not Firefox. I don't know why. I tried to download Firefox from scratch, but the result was the same--it crashed upon launch.

Is this a chat forum? Will someone help me from here? Should I just wait here?

Why does my iTunes program Hang upon startup?

Using Windows 7 ultimate-64bit OS. iTunes continues to hang and not respond upon start-up of program. Lists problem event name as: AppHangB1
Send Help!

See Troubleshooting issues with iTunes for Windows updates.
tt2

Firefox freezes upon startup, cannot change any settings

Since yesterday my Firefox will not open anymore.
It started with a problem concerning all my browsers; I could open them, click inside them, but whenever I'd start typing anything, they would freeze. I'd get a 'Not Responding' message and I'd have to close the programmes. However, a restart fixed this for Chrome and IE. Firefox got worse after that; whenever I open it now it won't even load, I immediately get a 'Not Responding' message and I'm forced to close the programme. I've tried uninstalling and reinstalling.
All support articles here suggest clearing cache and all that, but I can't do anything because it just immediately freezes.

There are two things you can try. But first, holding down the shift key
starts Firefox in Safe Mode. This disables all your add-ons and some
settings. If the browser works find in safe mode, then the problem could
be an add-on. But first do this. Go to '''''[https://www.mozilla.org Mozilla.org]'''''
to download the latest version of Firefox. DO NOT UPDATE. Get the full
installer. After you download the installer, remove Firefox using the
windows uninstaller. Then run the FF installer you just got. You will
not lose much of anything. Now try FF normally. If you still have problems,
then you will need to reset the browser. This will remove ALL ADD-ONS,
and reset ALL SETTINGS to their default settings. If the problem is
gone, then it was one of the add-ons. Re-install your add-ons only a
few at a time. Close FF, and restart after each group. Good Luck.
===================================
The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information. 
'''Note''': ''This will cause you to lose any Extensions and some Preferences.''
*Open websites will not be saved in Firefox versions lower than 25.
To Reset Firefox do the following:
#Go to Firefox > Help > Troubleshooting Information.
#Click the "Reset Firefox" button.
#Firefox will close and reset. After Firefox is done, it will show a window with the information that is imported. Click Finish.
#Firefox will open with all factory defaults applied.
Further information can be found in the [[Reset Firefox – easily fix most problems]] article.
Did this fix your problems? Please report back to us!
Thank you.

Firefox crashes upon startup

Starting today, every time I try to open Firefox it crashes immediately. I have uninstalled and removed the entire Firefox folder several times. Firefox is able to load in safe mode, but if I have to browse in safe mode I might as well use Google Chrome because it still works and can have addons. The only thing I can think of that I changed recently was I updated my NVIDIA drivers to version 285.79 Beta yesterday. I had 5.0 for the first crash and updated to 8.0.2 thinking it may fix the problem. I do not have any of the programs that frequently cause crashes.
https://crash-stats.mozilla.com/report/index/bp-1bea6bc8-86a4-4424-95e8-1b02c2111118

Create a new profile as a test to check if your current profile is causing the problems.
See "Basic Troubleshooting: Make a new profile":
* https://support.mozilla.com/kb/Basic+Troubleshooting#w_8-make-a-new-profile
There may be extensions and plugins installed by default in a new profile, so check that in "Tools > Add-ons > Extensions & Plugins" in case there are still problems.
If that new profile works then you can transfer some files from the old profile to that new profile, but be careful not to copy corrupted files.
See:
* http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox
See:
* http://kb.mozillazine.org/Firefox_crashes
* https://support.mozilla.com/kb/Firefox+crashes
* https://support.mozilla.com/en-US/kb/latest-firefox-issues

Firefox crashes upon startup every time

Our power went out unexpectedly and then Windows had a hard time restarting. I had to restore the settings to a snapshot of the system one month ago for me to be able to use Windows again.
Now Mozilla won't start, and every time I click on the Firefox icon, a crash report message appears.

Firefox does not always restore well that way. {'''edit '''<-- using Windows restore snapshots does not always create all files correctly ) You may have to do a clean reinstall, after deleting the firefox program folder. Take care in doing this:
* do NOT use any options from Windows or Firefox that suggest removing personal settings, or you will loose passwords and bookmarks.
*see http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Clean_reinstall note you are trying to retain your personal data and not delete any profile files
#Download firefox installation file (using any working browser) from getfirefox.com
#Delete from your computer the Firefox programs folder, for the faulty install as explained above.
#Find the downloaded install file and click or doubleclick to run it
Note there is likely to be a new version of firefox '''Firefox 10.0.1''' released within a few days, some users are having problems with 10.0 causing crashes.
It is possibly not worth following up on your crash ID at present, but please obtain and post them again if the new re-install also crashes. (See my recent post <s>[/917748#answer-308124]</s> [/questions/917748#answer-308124] for general info re the new crashes {edit Thanks for the pm Hasan, link fixed)

Firefox crashes upon Startup; no extensions, brand new profile

Even after a clean install (removing all previous profile settings and extensions/plug-ins), Firefox 7.0.1 still will not run as per it's normal operating characteristics.
Immediately after double-clicking on the icon, the Crash Reporter states a crash has occured. Alternatively, safe-mode will not start successfully either.
Any ideas?
Windows 7 Enterprise (32-bit)
HP EliteBook 8440p

Seems this is related to some Oracle software. The last posts in this thread have workarounds that can be used until Oracle can fix the problem https://support.mozilla.com/en-US/questions/880625

Firefox crashes upon startup. Tried reinstall to no avail.

Firefox doesn't start. At all. Not even in safe mode. I just get a crash report. I have run Malwarebytes several times as well as Avast. Tried clean reinstall five times. Any help really welcome. =/
Report details:
AdapterDeviceID: 0x0de0
AdapterVendorID: 0x10de
Add-ons:
AvailablePageFile: 12364881920
AvailablePhysicalMemory: 5442568192
AvailableVirtualMemory: 4008394752
BuildID: 20130409194949
CrashTime: 1367848893
EMCheckCompatibility: true
FramePoisonBase: 00000000f0de0000
FramePoisonSize: 65536
InstallTime: 1367848014
Notes: AdapterVendorID: 0x10de, AdapterDeviceID: 0x0de0, AdapterSubsysID: 00000000, AdapterDriverVersion: 9.18.13.1422
ProductID: {ec8030f7-c20a-464f-9b0e-13a3a9e97384}
ProductName: Firefox
ReleaseChannel: release
SecondsSinceLastCrash: 6
StartupTime: 1367848893
SystemMemoryUsePercentage: 36
Theme: classic/1.0
Throttleable: 1
TotalVirtualMemory: 4294836224
URL:
Vendor: Mozilla
Version: 20.0.1
Winsock_LSP: MSAFD Tcpip [TCP/IP] : 2 : 1 :
MSAFD Tcpip [UDP/IP] : 2 : 2 : %SystemRoot%\system32\mswsock.dll
MSAFD Tcpip [RAW/IP] : 2 : 3 :
MSAFD Tcpip [TCP/IPv6] : 2 : 1 : %SystemRoot%\system32\mswsock.dll
MSAFD Tcpip [UDP/IPv6] : 2 : 2 :
MSAFD Tcpip [RAW/IPv6] : 2 : 3 : %SystemRoot%\system32\mswsock.dll
RSVP TCPv6 Service Provider : 2 : 1 :
RSVP TCP Service Provider : 2 : 1 : %SystemRoot%\system32\mswsock.dll
RSVP UDPv6 Service Provider : 2 : 2 :
RSVP UDP Service Provider : 2 : 2 : %SystemRoot%\system32\mswsock.dll
This report also contains technical information about the state of the application when it crashed.

Hello,
'''Try Firefox Safe Mode''' to see if the problem goes away. 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 Firefox 4.0+ in Safe Mode by holding the '''Shift''' key when you open the Firefox desktop or Start menu shortcut.
* Or open the Help menu and click on the '''Restart with Add-ons Disabled...''' menu item while Firefox is running.
''Once you get the pop-up, just select "'Start in Safe Mode"''
'''''If the issue is not present in 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.
''To exit the Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.''
''When you figure out what's causing your issues, please let us know. It might help other users who have the same problem.''
Thank you.

Firefox freezes upon startup; forced reset everytime.

Hello, all,
I'm currently running Firefox 25.0.1 on Windows 7 Home Premium SP1 on a Dell XPS 8300, 64 bit OS. Recently, everytime I start up Firefox, it freezes automatically without my clicking anything. I'm then forced to hold down the shift key, while clicking the Firefox icon, in order to reset the browser. I've uninstalled/reinstalled it a few times, but the problem persists. I believe it might be a script issue, but can't be certain. This scenario plays out everytime I start my computer, which really puzzles me that I need to fix it everytime. Any ideas?
Thanks,
Lefky

There are two things you can try. But first, holding down the shift key
starts Firefox in Safe Mode. This disables all your add-ons and some
settings. If the browser works find in safe mode, then the problem could
be an add-on. But first do this. Go to '''''[https://www.mozilla.org Mozilla.org]'''''
to download the latest version of Firefox. DO NOT UPDATE. Get the full
installer. After you download the installer, remove Firefox using the
windows uninstaller. Then run the FF installer you just got. You will
not lose much of anything. Now try FF normally. If you still have problems,
then you will need to reset the browser. This will remove ALL ADD-ONS,
and reset ALL SETTINGS to their default settings. If the problem is
gone, then it was one of the add-ons. Re-install your add-ons only a
few at a time. Close FF, and restart after each group. Good Luck.
===================================
The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information. 
'''Note''': ''This will cause you to lose any Extensions and some Preferences.''
*Open websites will not be saved in Firefox versions lower than 25.
To Reset Firefox do the following:
#Go to Firefox > Help > Troubleshooting Information.
#Click the "Reset Firefox" button.
#Firefox will close and reset. After Firefox is done, it will show a window with the information that is imported. Click Finish.
#Firefox will open with all factory defaults applied.
Further information can be found in the [[Reset Firefox – easily fix most problems]] article.
Did this fix your problems? Please report back to us!
Thank you.

Firefox hangs upon startup

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