Firefox crashes on startup - opens normally in safe mode.

I've attempted to uninstall and reinstall.

Hello Hokie4Life, disable graphics hardware acceleration in firefox.
copy the next bold '''firefox -preferences''' and paste it in your win 7 run command
(if you have NOT enable the "run command" in your win 7, go from : right-click Start Button > Properties > click Customize > in "Customize Start Menu" dialog > Check [v] the box next to "Run Command" > click OK. Now the Run command will be displayed on the right side of the Start menu)
Now the Firefox ''Options'' window will open (with Firefox closed of course) > click the ''Advanced'' tab > then select ''General'' > in the settings list, you should find the ''Use hardware acceleration when available'' checkbox. '''Uncheck''' this checkbox.
Now, restart Firefox and see if the problems persist.
Additionally, please check for updates for your graphics driver by following the steps mentioned in the following Knowledge base articles:
* [[Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems]]
* [[Upgrade your graphics drivers to use hardware acceleration and WebGL]]
Thank you.

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Firefox 19 crashes on startup in normal and safe modes.

upon startup, ff19 crashes in both normal and safe modes. I've disabled all add ons and extensions.
XP Pro sp3.
It started crashing occaisionally, then increasingly more often, now, upon startup.
I tried reloading ff19.
I can't start ff with the -p command.
Crash ID: bp-89fc95f5-6efb-4c72-8721-fbf1b2110906
1361302409
1360392309
1358921494
1357934458
1354939166

its not correct crash id.
We're sorry to hear that your Firefox seems to be crashing when you open it. Please perform the following steps to give us a crash report ID that helps us find out more about the cause of the crash.
#Press the following shortcut to get a Run window: [Windows] + [R]. This should bring up a window that contains a text field.
#In that text field, enter %APPDATA% and press Enter. An explorer window should open.
#From that explorer window, double-click on the ''Mozilla'' folder, then double-click on ''Firefox'' and then on ''Crash reports''. Double-click on ''submitted''.
#Now, you should see a list of files that contain reports. Go to ''View'' > ''Arrange Icons by'' > ''Modified'' to get the most recent files at the top of the window.
#Open the most recent 5 files with a text editor and copy the IDs.
#Paste each ID with '''bp-''' into the reply window on the forums.
Thanks in advance!
You can find more information and troubleshooting steps in the [[Firefox crashes]] article.

I changed Java settings and now Firefox crashes as it opens, even in safe mode; how can I fix this?

I was trying to change settings to access the comments section of Slate.com. Right or wrong, I changed a Java setting from -1 to 2. The setting was in about:config and I believe it involved some sort of max. As I cannot open anything, I am not sure.
When I made the change, firefox crashed immediately, Every time I have tried to reopen, even in safe mode, it immediately crashes again and will not reopen.

Hi pternagy,
Sorry you are having problems.
For future reference. Those of us that mess directly with about:config soon learn how to recover from mistakes and what it is sensible to backup. Occasionally backing up your entire profile for instance can be useful and would have probably given you a quick solution of copying over the file from that backup.
*[[Back up and restore information in Firefox profiles]]
Ok on to the subject of trying to get Firefox back as it was:
Find your profile and the file ''prefs.js'' and rename that. (The renamed file is a potentially useful backup.) Firefox is then forced to regenerate the file and will reset your preferences to the default. You can then re open and use Firefox. Next try to get it back to normal.
Trying to manually edit the file ''prefs.js'' is normally a bad idea. However if it is a single pref change it may be possible to directly edit the prefs.js file (whilst Firefox is closed) to get everything back to how it was before . You have the renamed file to work with. Probably best to test all this out in a new additional profile then you only break additional test profiles not working profiles essential to Firefox.
These articles should help you:
* http://kb.mozillazine.org/Prefs.js_file
* [[Reset Firefox preferences to troubleshoot and fix problems#w_solution-2-delete-firefox-preference-files]]_solution-2-delete-firefox-preference-files
*[[Profiles - Where Firefox stores your bookmarks, passwords and other user data#w_finding-your-profile-without-opening-firefox]]#w_finding-your-profile-without-opening-firefox
* http://kb.mozillazine.org/Using_multiple_profiles_-_Firefox
Please post back with how you get on and whether you need any extra help.
Good Luck.

Firefox crashes immediately upon opening, even in safe mode

Completely uninstalled and reinstalled twice. There's no add-ons or any extras whatsoever installed.

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
If you have submitted Breakpad crash reports then post the IDs of one or more Breakpad crash reports (bp-xxxxxxxx-xxxxxxxxx-xxxx-xxxxxxxxxxxx). You can find the IDs of the submitted crash reports on the about:crashes page. You can open the about:crashes page via the location bar, like you open a website.
See:
* http://kb.mozillazine.org/Breakpad (Mozilla Crash Reporter)
* https://support.mozilla.com/kb/Mozilla+Crash+Reporter
* https://developer.mozilla.org/en/How_to_get_a_stacktrace_for_a_bug_report

FireFox 4 Crashes When Started (Both Normal and Safe Mode)

When I open up FireFox 4 (both in normal mode and safe mode) it crashes within a few seconds. It is a fresh install of FireFox 4 but I also have FireFox 3.6 installed as well. The report that was given is:
Add-ons: [email protected]:1.0.6,{5F590AA2-1221-4113-A6F4-A4BB62414FAC}:0.45.6.20100202.1, :1.2,[email protected]:1.0rc1,{8545daff-ad1e-493f-a37e-eed1ac79682b}:1.0,[email protected]:6.0,{972ce4c6-7e08-4474-a285-3208198ce6fd}:4.0b1
BuildID: 20100630141702
CrashTime: 1279002364
EMCheckCompatibility: true
Email: [email protected]
FramePoisonBase: 00000000f0de0000
FramePoisonSize: 65536
InstallTime: 1278990773
ProductName: Firefox
ReleaseChannel: beta
SecondsSinceLastCrash: 38
StartupTime: 1279002344
Theme: classic/1.0
Throttleable: 1
URL: http://en-us.start3.mozilla.com/firefox?client=firefox-a&rls=org.mozilla:en-US:official
Vendor: Mozilla
Version: 4.0b1
I have Windows 7 32bit

1. You have a pre-release Beta 1 version of what will become Firefox 4 in like 5 or 6 months. Unless you are intending to test it for flaws and report those flaws to help in the development process, don't use it.
2. Did you create a new Profile for 4.0b1, and are you using that Profile with it? ''That isn't done automatically when you install 4.0b1, and those of us who have been doing the "testing" for many years consider a new Profile as the basis of doing out testing.''
[http://support.mozilla.com/en-US/kb/Managing+Profiles]
IMO, Mozilla is making a huge mistake by directly offering these beta versions to the general public.
Also IMO. if you want to play with 4.0b1, use the Portable Firefox 4.0beta version to minimize any conflicts with a currently installed version of Firefox, and to eliminate the need for creating a new Profile for 4.0 Beta #:
Download Firefox Portable Test to your hard drive and double click the '''FirefoxPortableTest_4.0_Beta_#_English.paf.exe''' file. The entire installation (including a new Profile for "Portable") will be self-contained in the \Program Files\FirefoxPortableTest\ folder and won't interfere with an "official" version that you already have installed. Your Profile will be in the \Program Files\FirefoxPortableTest\Data\profile\ folder.
The "down side" is that Firefox Portable won't launch if any other version of Firefox is already running.
[http://portableapps.com/apps/internet/firefox_portable/test]

MF Crashes on startup, but works in safe-mode and for a few minutes after making a new user, can anyone help?

After troubleshooting for a few hours, I still cannot find a proper solution. Effectively, I learned that if I create a new profile user, with this command in windows Run: "C:\Program Files\Mozilla Firefox\firefox.exe" -p , I can open the user profile menu manually, and create/delete a new/not-new user, and upon creating and using a new one, it works fine. For a couple of times opening the browser, anyway, in which it results in the same problem as before. I took a list and compared the old files to a brand new users files, and did find some differences. Take these into effect,
The compatability and extensions .ini files were differed by 3 kb , with a new user being 1, and the old user being 4.
The Local Store .rdf file differed from 2 for a new user, to 4 for an old user.
The Mime Types .rdf file differed from 3 for a new user to 4 for an old user.
Plugin Reg(istry?) .dat differed from 17 new to 20 old.
Search.json differed from 13 new to 16 old.
Search Metadata.json differed from 1 new to 4 old.
URL Classifier Key 3.txt differed from 1 new to 4 old.
Web App Store.sqlite differed from 96 new to 128 old.
(All units are KB)
Seeing as a few articles relating to the problem are "no longer maintained" and the solutions work only temporarily, I came here hoping to fix this little issue. Thank you, and good luck in advance.
-Av
Note; the first crash ID is for the new user that crashed, the last is for an old user.

I see.. I have heard rumors of this, but it did not occur to me that this would literally crash upon startup. Thank you for the help, Edmeister. Will check as "solved it" if it works. Thanks again!

Firefox crashes after 10 seconds; same in safe mode

Tried opening firefox, it crashed after 10 seconds regardless of which website I opened (this includes Firefox preferences). Same goes for safe mode. Tried updating to most recent version, uninstalling, and reinstalling and same thing occurs. Tried dragging preferences file to desktop to create a new one and nothing changed.

Uninstalled 10.0.1, installed 10.0.2 and tried to 'Launch Firefox' directly from install. Crash. Tried to open in safe mode. Crash.
Tried to retrieve crash report ID, Windows Search tells me nothing matches
"%APPDATA%\Mozilla\Firefox\Crash Reports\submitted" when I search it.
Otherwise I would have provided that information.

Firefox crashes on start-up, even in safe mode

Back in March/April 2012, Firefox started crashing for me on start up, possibly after the automatic/remote installation of MS security patches. After that time, I've not been able to start Firefox without it going directly to the Mozilla Crash Reporter. I've tried everything I could think of including safe-mode, uninstall/re-install, uninstall/back-up profiles directory/wipe profiles and all registry entries/re-install. This continues to fail since version 11(?) through 13.0.1. Even Sea Monkey crashes same manner. BTW, clicking on the "Details" button in the Mozilla Crash Reporter has no effect for me. I was trying it to help fill in the Troubleshooting Information box below as I can't get to "Help > Troubleshooting Information" as Firefox doesn't start.

What was the location of the file?
See:
*https://support.mozilla.org/kb/Recovering+important+data+from+an+old+profile
*http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

Firefox crashes at start up, even in safe mode

Firefox crashes on start up. Crashes in safe mode as well. Tried steps on articles. Was watching adobe flash player when it crashed first time.

Any other recent crash IDs (maybe some have links to bugs or other posts)
Crash report: [https://crash-stats.mozilla.com/report/index/ba759d32-e684-4f6c-813b-679ce2111005 ba759d32-e684-4f6c-813b-679ce2111005] 
Crash signature: nsSecureBrowserUIImpl::OnLocationChange(nsIWebProgress*, nsIRequest*, nsIURI*)
That one does not seem to give any useful info at present.
Malware is one common cause of crashes, and that may produce variable crash reports, it is probably worth doing full scans with multiple tools/software to try to rule out the possibility of malware.
*See [[is my firefox problem a result of malware]]
Besides trying in safe mode did you also try disabling all plugins whilst in safe mode. (If it crashes before then, are you able to create a new profile and try that ? ) Also if crashing before about:crashes may be entered have you seen http://kb.mozillazine.org/Breakpad#Location_of_crash_reports
Sorry I am not able to give a useful answer at the moment.

Firefox crashes all the time, even in safe mode

Firefox keeps crashing, even in safe mode. I've tried updating my graphsic accelerator, disabling it; i've updated all extensions, windows and firefox.

That is a problem with "Constant Guard" from Comcast (PInvokeCalliWorker; bug 684748)
* [[/questions/871697]]
* [[/questions/870380]]

Firefox crashes and wont start even in safe mode windows 7 system crash report is Crash ID: bp-685273fa-1232-4585-9024-7e3142120101

Windows 7 system. I think I was running a beta of firefox 9. Please help! XX

Start Firefox in [[Safe Mode]] to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).
*Don't make any changes on the Safe mode start window.
*https://support.mozilla.org/kb/Safe+Mode
See:
*http://kb.mozillazine.org/Firefox_crashes
*https://support.mozilla.org/kb/Firefox+crashes

Firefox crashes all the time, even in safe mode. Unable to even bring up profile manager

This just started a few days ago, when it updated to 33.0.
Windows 7 on a laptop
I have run a malware scan and it found nothing.
I've tried uninstalling and reinstalling, still crashes
I've tried to create a new profile, and profile manager won't start
It crashes EVERY time, constantly, if you say to restart it just crashes again.
Latest Crash ID: bp-c186f91b-14a7-45be-9dc8-a27b02141110

Hello,
The latest version of Firefox is currently 33.1.1 - can you try updating to the latest version then see if the crash still happens?
* https://www.mozilla.org/en-US/firefox/new/
* (full installers) https://www.mozilla.org/en-US/firefox/all/
According to your crash report, "nvumdshim.dll" is flagged. Can you also try updating your video drivers?
* [[Upgrade your graphics drivers to use hardware acceleration and WebGL]]

Crash on startup in regular and safe modes

Upgraded video driver
Uninstalled KB2670838
Crash IDs
<pre><nowiki>bp-bbff1ded-1867-4007-a925-6fc8a2130502
bp-29a96131-0f4b-4178-961a-849db2130502
bp-599b4e5d-bc83-4fca-b36d-18bf82130502
bp-e06277a0-8a11-448c-972c-eb2da2130502
bp-71a4b991-9e03-41cd-9385-99b0c2130502</nowiki></pre>

Then contact your IT department, and ask them to update your websense to 1138 or later.

At odd times I will get a second instance of Firefox startup. I have run avast av, spybot, malwarebytes, both in normal and safe mode and nothing has been found, any ideas?

at odd times I will get a second instance of Firefox startup. I have run avast av, spybot, malwarebytes, both in normal and safe mode and nothing has been found, any ideas?

That second one sounds like malware.
Do a malware check with some malware scanning programs on the Windows computer. 
You need to scan with all programs because each program detects different malware. 
Make sure that you update each program to get the latest version of their databases before doing a scan. 
*http://www.malwarebytes.org/mbam.php - Malwarebytes' Anti-Malware
*http://www.superantispyware.com/ - SuperAntispyware
*http://www.microsoft.com/security/scanner/en-us/default.aspx - Microsoft Safety Scanner
*http://www.microsoft.com/windows/products/winfamily/defender/default.mspx - Windows Defender: Home Page
*http://www.safer-networking.org/en/index.html - Spybot Search & Destroy
*http://www.lavasoft.com/products/ad_aware_free.php - Ad-Aware Free
See also:
*"Spyware on Windows": http://kb.mozillazine.org/Popups_not_blocked

I have read up on all about crashes and i cant even open it in safe mode :( i have tried deleting it and reinstalling it but the problem still persists. What would you suggest i do and is there any way i canget hold of firefox 6 for mac?

i have read up on all about crashes and i cant even open it in safe mode :( i have tried deleting it and reinstalling it but the problem still persists. What would you suggest i do and is there any way i canget hold of firefox 6 for mac?

Does the regular Firefox 8 release version work or does the version crash as well?
*Firefox 8.0.x: http://www.mozilla.com/en-US/firefox/all.html
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

Firefox crashes on startup - opens normally in safe mode.

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