Firefox will not open in regular or safe mode?

I am unable to open Firefox regular or safe mode. Last night it began to update on its' own and crashed. I immediately tried to open Firefox but was unable to do so. Now after rebooting numerous times, I still can't open it. No parts of FF are running in the task manager. I don't know what to do. Can anyone help me please?

Do a clean reinstall.
Download a fresh Firefox copy and save the file to the desktop.
* Firefox 6.0.x: http://www.mozilla.com/en-US/firefox/all.html
* Uninstall your current Firefox version.
* Do not remove personal data when you uninstall the current version.
Remove the Firefox program folder before installing that newly downloaded copy of the Firefox installer.
* It is important to delete the Firefox program folder to remove all the files and make sure that there are no problems with files that were leftover after uninstalling.
Your bookmarks and other profile data are stored elsewhere in the Firefox Profile Folder and won't be affected by a reinstall, but make sure that you do not select to remove personal data if you uninstall Firefox.
* http://kb.mozillazine.org/Profile_folder_-_Firefox
* http://kb.mozillazine.org/Profile_backup

Similar Messages

Firefox will not open even in the safe mode

Started with the addition of beta 4 where gmail would not open and it froze firefox. Added whatever the new addition was yesterday (3/14/11) and then firefox would not even open. Tried safe mode but it still will not open. Error message below

Do a clean (re-)install:
* Download a fresh Firefox copy and save the file to the desktop.
* http://www.mozilla.com/firefox/all-beta.html
* Remove the Firefox program folder before installing that copy of the Firefox installer.
* Don't remove personal data if you uninstall the current version.
* It is important to delete the Firefox program folder to remove all the files and make sure that there are no problems with files that were leftover after uninstalling.
Create a new profile exclusively for the Firefox 4 version and create a desktop shortcut with -P "profile" appended to the target to launch that profile.
* http://kb.mozillazine.org/Testing_pre-release_versions
* http://kb.mozillazine.org/Creating_a_new_Firefox_profile_on_Windows
* http://kb.mozillazine.org/Shortcut_to_a_specific_profile
* http://kb.mozillazine.org/Using_multiple_profiles_-_Firefox

Sleep mode crashed - Will not launch in regular or safe mode (Yosemite)

I put Yosemite to sleep last night, and woke up to a frozen screen the next day.
I hard rebooted the computer and the loading bar freezes at about 50%. I have tried multiple reboots and from time to time, the computer will make it to the desktop and the pinwheel but no icons or menu bar.
When booting in safe mode after a long time I also get to the desktop with the pinwheel and no icons or menu bars.
Very frustrating! 2012 Macbook pro i7 2.7.
Anyone have this - and or find a solution.
Thanks!

Freezing on sleep wake up is a known concern. 2012 models seem to be the most affected. I have a late 2012 Mac Mini i5 and since upgrading to OS x Yosemite I've had to disable sleep mode. I have an open case with Apple about the concern and recommend you open one as well - as one user said an Apple tech stated it was a low priority concern. It's a very HIGH PRIORITY concern for me. My thoughts.

Firefox will not open at all (regular, safe mode, profile manager).

Firefox hung while using the Garmin import plugin on the mapmyrun.com page. No crash report was provided. After closing it, firefox will no longer open.
It appears in the taskmanager momently, but then disappears before any window appears. It never consumes more than 1004K of RAM before it disappears.
It will not open in regular mode, safe mode, or in profile manager. In each case the result is the same.
I rebooted. No change.
I reinstalled it over itself. No change.
I completely uninstalled it, and then reinstalled it. No change.
I deleted sessionstore.js and replaced it with sessionstore.bak. No change.
I can't open the profile manager.

You can do a disk check with the chkdsk.exe program.
If you run the chkdsk.exe program from a cmd.exe Command window then you can read the response from the chkdsk.exe program.
Open a cmd.exe window:<br />
Start > Run: cmd.exe <press Enter>
At the command prompt (>) type or Copy&Paste: chkdsk.exe /f /r <press Enter> (put a space before /f and /r)
If you get something like: Would you like to schedule this volume to be checked the next time the system restarts? y/n then answer the question with "Y" and close all programs and reboot the computer.
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]]
* http://kb.mozillazine.org/Browser_will_not_start_up

I have no navigation bar and firefox will not open in safe mode to reset to default config. Reinstalling doesn't work. Any help please.

I have no navigation bar ever since I closed it to gain more space on the screen. It won't re-open. Firefox will not open in safe mode, but opens immediately in normal mode with the new improper config, so I cannot reset to default config. I erased Firefox and re-installed and it still opens with the same faulty config. Why does Firefox not give me the safe mode dialog box, why can I not re-open the nav bar, and how can I do these two things, please? Firefox is currently unusable for me without a nav bar and without access to the default settings in safe mode. I cannot research the extensions I'm running since I have no nav bar to go to Tools, Add-ons, Extensions.
== This happened ==
Every time Firefox opened
== I closed the navigation bar to gain more space on the screen and I couldn't re-open it. ==
== User Agent ==
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; GTB6.4; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0)

Hit the '''Alt''' key to show the Menu bar, then open View > Toolbars and select Menu bar and Navigation bar, so they have a check-mark.

Firefox will not open to home page as directed in options and settings. Opening in safe mode makes no difference, either. Any ideas?

Firefox will not open to home page as set in the settings. Even in safe mode, it still will not open to home page as directed. It seems to want to open to last set of tabs, even though that is not the way it was set in settings. It seems as though the settings do not have any impact on the way it behaves!!!

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
If the new profile works then you can transfer some files from an existing profile to the new profile, but be careful not to copy corrupted files.
*http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox
Do a clean reinstall and delete the Firefox program folder before reinstalling a fresh copy of Firefox.
Download a fresh Firefox copy and save the file to the desktop.
*Firefox 20.0.x: http://www.mozilla.org/en-US/firefox/all.html
Uninstall your current Firefox version, if possible, to cleanup the Windows registry and settings in security software.
*Do NOT remove personal data when you uninstall your current Firefox version, because all profile folders will be removed and you will also lose your personal data like bookmarks and passwords from profiles of other Firefox versions.
Remove the Firefox program folder before installing that newly downloaded copy of the Firefox installer.
*It is important to delete the Firefox program folder to remove all the files and make sure that there are no problems with files that were leftover after uninstalling.
*http://kb.mozillazine.org/Uninstalling_Firefox
Your bookmarks and other profile data are stored in the Firefox profile folder and won't be affected by an uninstall and (re)install, but make sure that "remove personal data" is NOT selected when you uninstall Firefox.
*http://kb.mozillazine.org/Profile_folder_-_Firefox
*http://kb.mozillazine.org/Profile_backup
*http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Clean_reinstall

Firefox will not open ANY site. Wont work AT ALL. Nothing seems to be working.

Firefox will not open ANY site. It worked last night, but not today. I uninstalled it many times, didn't worked. It displays the screen that says "unable to connect" yet chrome and explorer both work. I have disconnected and reconnected a few times, restarted my laptop, neither of those worked either. I have also tried turning "safe mode" off after re installing firefox, but again, that did not work. I need help :(.
Although, before this, firefox was not letting me use voice recording sites or any site that let me watch television online. It would load the commercials, but not play the episode. It wouldn't even let me upload pictures to photobucket. However, it worked using chrome or explorer.

Looks like a bunch of people have this problem. Anyone got any ideas to fix this???

Firefox will not open after attempting to upgrade to v5, sys restore didn't help

Was running 3.6 with no problems, but trying to upgrade today apparently broke it. The upgrade failed for some reason (the old .exe is still the only one in the Firefox folder & I can't find any files newer than April 2010 in there), but no matter how I try to run it, nothing happens - Firefox will not open, period. I tried reverting to last week with sys restore, scanning for malware with Malwarebytes, but still nothing happens. I'm using WinXP 5.1 media edition SP2 (yes, it's been around a few years but it works for me). I'm now using Chrome which seems to run just fine, tho I miss all my plugins.

Hi lwhealon
try from Start > Run > and type to check 1 of :
firefox -safe-mode
"C:\Program Files\Mozilla Firefox\firefox.exe" -safe-mode '''or'''
"C:\Program Files (x86)\Mozilla Firefox\firefox.exe" -safe-mode
(to enable the Run box in win 7 see: [http://blogs.msdn.com/b/tims/archive/2006/09/18/windows-vista-secret-3-bringing-back-start-run.aspx enable Run box win 7] )
also check if [http://kb.mozillazine.org/Firewalls Firewall] or/and other security software blocking firefox start (like ad-blocker, web-accelerator etc).
[http://kb.mozillazine.org/Kill_application With Firefox completely closed] (probably because you can not start it), open the [http://kb.mozillazine.org/Installation_directory application folder] (by default, C:\Program Files\Mozilla Firefox on Windows) rename firefox.exe to firefox1.exe, then double-click firefox1.exe. If Firefox runs without problems, it could indicate that your firewall is blocking Firefox.
good luck

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 now - I just updated my privacy settings, and cleared cookies - what happened?

I changed the privacy settings on Firefox preferences, including clearing cookies, history and cache, and now Firefox will not open at all. It said it had to restart after one of the privacy changes, but it didn't and now won't open by the dock icon or thru applications. What happened, and how can I correct the issue to start using Firefox again? Thanks.

Hello,
Try start in Safe Mode:
*[https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode Firefox in safe mode]
Also see this article:
*[https://support.mozilla.org/en-US/kb/firefox-does-not-work-common-fixes Firefox does not work - Common fixes to get you back up and running]

Firefox will not open after unlocking Sempron

After upgrading to a new motherboard and unlocking Sempron processor, Firefox will not open. I have tried Firefox (safe mode) and rolled back to a previous version, but to no avail. It worked fine when I ran the Sempron 140 as a single core (even overclocked to 3.17ghz) on Biostar A785GE motherboard. I cannot find a crash ID to link to.
== User Agent ==
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; (R1 1.6); Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) ; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; SLCC1; OfficeLiveConnector.1.5; OfficeLivePatch.1.3)

Maybe you restored to a version of Firefox that crashes or still have a virus problem.
(irrc some Firefox versions specifically had problems after Windows restores)
Follow up checking for malware and then try re-installing Firefox. I would also suggest you make a copy of your [[profiles|profile]] including all folders and sub files and put it somewhere safe as it may assist in restoring your bookmarks and information.
See also
*[[backing up your information]]
* [[is my firefox problem a result of malware]]
* a typical post about malware checks:<br/>[/questions/914980#answer-302372]

Firefox Application will not start unless in PC Safe Mode

== Issue
==
I have another kind of problem with Firefox
== Description
==
A couple of days ago after seemingly working fine the day before Firefox suddenly decided to stop working. I seem to recall updating both my Adobe Flash and my Java on that day, and I'm also not 100% sure that I didn't change my Overclock settings too (but I think I did that and Firefox was still working)
Basically if I "start" Firefox from any location be it shortcut, direct executable or otherwise the application does not "run" I get the process but that is all. I have tried renaming to various combinations but still nothing appears to have any effect. Using the -profilemanager suffix in my shortcut / startmenu search and creating and using a new Profile has no effect either as does deletion, and Firefox Safe Mode shows the settings window but after choosing to open in safe mode nothing happens and I am left with the Firefox process hanging there doing nothing. I have tried multiple compatibility and administrator run settings but no effect.
I have uninstalled, reinstalled. Done full cleans deleting everything to do with Firefox and its Profiles. Uninstalled Flash and Java, and then Reinstalling FF. I have scoured the registy deleting anything obviously connected to Firefox, Mozilla and even Java to no effect (I have not cleaned out for Flash due to having multiple Adobe apps which I would prefer not to screw up.) I have downgraded from 3.6.3 to 3.6.2 and as far as 3.5.1 and then doing upgrade to the new 3.6.4. All with the help of my CCleaner to tie off any loose ends, but nothing seems to work. Can't restore pc to earlier date as I only remembered about it after I had already made too many changes.
The only time I can manage to run Firefox properly at all is when I am in Windows Safe Mode, I am sick of Google Chrome as it feels really slow and I also dislike Safari, Opera and Internet Explorer. I really do not know what else to do and would really appreciate some help so that I may use the only good browser that I have found again.
== This happened
==
Every time Firefox opened
== 5~ Days ago? Unsure
==
== Troubleshooting information
==
C/P from Safe Mode Windows
Application Basics
Name
Firefox
Version
3.6.4
Profile Directory
Open Containing Folder
Installed Plugins
about:plugins
Build Configuration
about:buildconfig
Extensions
Name
Version
Enabled
ID
Modified Preferences
Name
Value
browser.places.smartBookmarksVersion
2
browser.startup.homepage_override.mstone
rv:1.9.2.4
extensions.lastAppVersion
3.6.4
network.cookie.prefsMigrated
true
privacy.sanitize.migrateFx3Prefs
true
== Firefox version
==
3.6.3/3.6.4
== Operating system
==
Windows 7x64
== User Agent
==
Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/533.4 (KHTML, like Gecko) Chrome/5.0.375.70 Safari/533.4
== Plugins installed
==
N/A

Firefox will only open in safe mode and other issues in Firefox 3.6.8
Rig / Set-up:
Win 7 (U.S.) / Ultimate 32bit
• P.O.S. Internet Explorer not installed…
• Firefox Default Browser
This Event:
1. Firefox will immediately close after opening 2 blank (Untitled) tabs and /or 2 (Untitled) windows.
2. Firefox will not open a 2nd time.
3. Firefox will only open in Safe-mode (.exe))
4. Firefox excruciating slow Start-Up
5. Firefox web –surfing unbearably slow
6. Firefox unpleasant web page hanging behavior
7. Firefox awful flash content behavior / Obnoxious Adobe Flash Player has always been and will always be crap.
The Cause:
Session Manager = Corruption …!!!
o This issue was created by faulty and inconsistent and flawed M$ Win 7 legacy software support for Hardware.
 The Keyboard / Hardware would generate a separate session manager event with the action/Web key.
 Firefox and/or TabMixPlus session manger were corrupted in the event process.
The Source:
A: Microsoft Windows 7 Ultimate32-US Version = substandard legacy device handling :
B: Hardware/Keyboard (shortcut) Customization Software Conflicts causing Corruptions of Firefox-Session Manger.
The Fix..!!!
I. Remove from Add and Remove Programs (Win7) Hardware/Keyboard Software “only”. ..Special note: Win 7 Updated- Hardware/Keyboard Device driver does not have to be removed...!!
II. Clean and remove all Instances of Keyboard software.
a. The “Best-est and Safest” Registry Cleaner is jv16 2010 Power Tools.
b. Restart Computer.
III. “If” available install an older version of your “Hardware/keyboard software” compatible with Win 7 that will allow some customization of Hardware/Keyboard-keys.
Confirm fix by:
1. Restart Firefox from Hardware/Keyboard key (shortcut).
2. Clean-up Internet crap and corrupted session managers...
3. Test Launch keyboard shortcut of Firefox.exe [“after” a clean-up of all internet crap]…
4. Test launch keyboard shortcut again / use Firefox extensively or normal use for any recurring bad web behavior.
If Corruption events occur again:
i. Use different and / or Older Keyboard “software” with win 7.
ii. Or you will have to wait for a Win 7 Hardware/Keyboard software update for keyboard installed.
Note:
“Do not use the hardware or keyboard shortcut-key for Web Browsing… Or else: // This Event (See Above): …Will Continue..!!!..”
And it is “not” a Firefox 3.6.8 issue.
So, look elsewhere.
Look @ the main culprits:
a. Substandard legacy device handling: Micro$oft Windows Operating System in combination / with.
b. Customization Software for your keyboard or other hardware that generates web functions and web sessions. / Hardware driver may not be the problem.
Add-on:
Flash Switcher Win / 1.0.2_
DownThemAll! / 1.1.10__
Personal Menu / 4.3.2__
Tab Mix Plus / 0.3.8.4__
Theme Font Size Changer / 0.2_
MR Tech Toolkit / 6.0.4__
Menu Editor / 1.2.6
It is with hope that this solution may help someone.?
Happy Foxing..!!!

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 new window after clicking on link

if I click on a hyperlink in an email message (Apple Mail) then Firefox will not open (if not running).
== This happened ==
Every time Firefox opened

Start Firefox in [[Safe Mode]] to check if one of your add-ons is causing your problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).
See [[Troubleshooting extensions and themes]] and [[Troubleshooting plugins]]

Firefox will not open st george bank logon window

Firefox will not open the St George logon window. It has for morre than 5 years but in the last 48 hours it has stopped. IE and Crome still do. We have cached web content, opened Firefox in safe mode, uninstalled and reinstalled Firefox 6 times and tried many ideas other people have suggested in the online forum - seems we are not an isolated case! We are using Firefox version 19 and just about ready to uninstall it for the last time out of sheer frustration. I

Reload web page(s) and bypass the cache to refresh possibly outdated or corrupted files.
*Press and hold Shift and left-click the Reload button.
*Press "Ctrl + F5" or press "Ctrl + Shift + R" (Windows,Linux)
*Press "Command + Shift + R" (MAC)
Clear the cache and the cookies from sites that cause problems.
"Clear the Cache":
*Tools > Options > Advanced > Network > Cached Web Content: "Clear Now"
"Remove Cookies" from sites causing problems:
*Tools > Options > Privacy > Cookies: "Show Cookies"
Start Firefox in <u>[[Safe Mode|Safe Mode]]</u> 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).
*Do NOT click the Reset button on the Safe mode start window or otherwise make changes.
*https://support.mozilla.org/kb/Safe+Mode
*https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes
*http://kb.mozillazine.org/Error_loading_websites
*http://kb.mozillazine.org/Websites_look_wrong

Firefox will not open in regular or safe mode?

Similar Messages

Maybe you are looking for