Read the fixes and still having problems. Firefox will not open at all and I receive a crash report upon launch. Have restarted, shut down, run virus and malware checks and even tried downloading and reinstalling with no response. Please assist.

Read the fixes. Cannot open Firefox in safe mode. Have tried reinstalling Firefox. Crash occurs each time I try to launch Firefox. Have run scans, checked for malware, spyware, installed all windows updates and still no luck.
Have accessed my crash reports. One of the reasons indicated is:
GenuineIntel family 6 model 23 stepping 10
Crash Reason
EXCEPTION_ACCESS_VIOLATION_WRITE
Have no idea how to fix this and have had crash reports since yesterday evening.
Signature: nsStandardURL::SchemeIs(char const*, int*)

Sorry believe something got miscommunicated. Wasn't trying to qualify firefox as malware - was terming it that way because the malware was crashing Firefox and no other issue. Worked on it and had isolated the virus in avast (put it in the chest) and was searching for assistance on why even after isolating the virus and restarting (some forums had indicated to then uninstall and reinstall Firefox, which I did), still would not launch without the crash report.
Worked the problem and eventually installed a 5.0 version of Firefox and it launches. Only seems to have the crash report with 6.0 or higher.
The forums had suggested that if after isolating the malware in avast or disinfecting it with MBAM (tried that too), to uninstall and then reinstall the latest version of firefox. That's when I tried the older versions. Had run a boot log scan as well and didn't see any additional problems. Just can't launch in 6.0 or higher.

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After working fine for years, this morning lost homepage, settings and themes. Now, Firefox will not open at all.

I've had Firefox for years. This morning, my theme, homepage, and settings were gone and I could not restore them. Now I can't open Firefox at all, no matter what I try.
== This happened ==
Every time Firefox opened
== This morning

Firefox keeps that info in a separate folder called your "profile". It's possible that a new profile was created. But does your original still exist? Try starting Firefox in the profile manager to see if there are other profiles listed. See [[Managing profiles]]

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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

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.

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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 only get the Mozilla Crash Reporter over and over.

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I was told I had to upgrade Firefox to 4.0, downloaded the dmg, launched it and now Firefox will not open at all.

I was told I had to upgrade Firefox to 4.0, downloaded the dmg, launched it and now Firefox will not open at all. It tells me "The operation can't be completed because you don't have permission to access some of the items." Also, that "Firefox cannot be opened because of a problem." And it give a bunch of code. This is my main browser. What is happening here? My OS X is 10.6.7. Has this caused a problem?

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See possible fixes here.
https://discussions.apple.com/message/19760703#19760703
https://discussions.apple.com/thread/4311280?tstart=0

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Google Chrome my main web browser with Comcast as home page.
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Yes, i would try reinstalling Firefox first.
A few other basic trouble shooting things you can try is this:
Run all Windows Updates, install all needed service packs, etc.
Update your graphics driver (Firefox uses your graphics card for some rendering, and an out of date graphics card driver can cause problems. [[Upgrade your graphics drivers to use hardware acceleration and WebGL]]
Update all your plugins (Flash, Java, etc.): [http://www.mozilla.org/plugincheck/ http://www.mozilla.org/plugincheck/].
Download and Install MalwareBytes Anti-Malware, run a full Scan. [http://www.malwarebytes.org/ http://www.malwarebytes.org/]. This helps check that there are no viruses on your computer causing issues. You can uninstall this program after you clean off any infections.

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/ <br>
For Windows 8: http://www.intowindows.com/shortcut-key-to-boot-into-the-hidden-safe-mode-in-windows-8/

Firefox will not open at all, no message , nothing. The other browser (internet explorer) opens fine. Do I delete the old program and reinstall it? It works fine on the other two accounts on this computer.

no other details, I click on foxfire, the hourglass figure
appears for a few seconds then goes off and nothing else happens.

Try the procedures in the [[Firefox will not start]] article.

After instaling the last update for Beta 9, Firefox will not open

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Start Firefox in <u>[[Safe Mode]]</u> 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.com/kb/Safe+Mode
You can try to reset the preferences if that didn't work.
See also:
*http://kb.mozillazine.org/Firefox_crashes
*https://support.mozilla.com/kb/Firefox+crashes
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 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 the "Bookmarks and history system will not be functional" problem and not FireFox will not open at all and my whole computer freezes if I try.

For a few weeks now, I've been getting the "Bookmarks and history system will not be functional..." message. When I clicked for more information, FireFox would freeze.
I found a solution about a new places database, but for the past few days I can't get FireFox to open at all. Then my whole system is frozen and I have to turn it off to get it going again, thus losing a lot of unsaved data.
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A possible cause is a problem with the file places.sqlite that stores the bookmarks and the history.
*http://kb.mozillazine.org/Bookmarks_history_and_toolbar_buttons_not_working_-_Firefox
*https://support.mozilla.com/kb/The+bookmarks+and+history+system+will+not+be+functional

Firefox will not open at all, and wen I try to uninstall it tell me that Firefox must be closed to proceed with te uninstall even though it is not open.

I click on Firefox and notihing happens. I have tried to uninstall the program so that I can reinstall it, but wen I try that, it tells me
"Firefox must be closed to proceed with the uninstall. Please close Firefox to continue."
But the program is not running. It won't let me open it either. I have college lectures that can only be viewed on Firefox, so I am not able to do my homework. Please help.

This may be a number of things, but conflict is most common, so here are some suggestions that may help you get to the bottom of the matter:
Be sure that a firewall is not blocking the startup of Mozilla. Some firewalls will come with "self defense" mechanisms for spyware/malware, but these programs can also isolate useful programs as well. Norton 360, Comodo Internet Security, Zone Alarm, AVG antivirus and McAffee Internet Security Suite incorperate these methods among several others.
Basic solution: To get around this type of blocking you will have to disable the self defense mechanism in your firewall or add an exception for firefox.exe.
In depth instruction for Windows users:
''''''This may be hard to follow, because the posting tool does not recognize spaces, but here goes...THIS IS NOT FOR THE FAINT HEARTED.''''''
1)Open the mozilla browser. When nothing happens...go to next step.
2)hold CTRL, ALT and the DELETE key together. In XP you will get an immediate task manager window...Go to next step. Under Vista or Windows 7 you will get a login screen that has a START THE TASKMANAGER button at the bottom. You will push this button then go to the next step.
3)In the Windows Task Manager click the Processes tab.
4)Run down the list and find all occurrences of firefox.exe
5)right click each firefox.exe and from the drop down list choose End Process Tree then answer YES or OK to the prompt box.
Firefox is now closed...Now we can determine the issue.
6)Start firefox in safemode by clicking on START or the WINDOWS ORB to open the START MENU.
7)Choose ALL PROGRAMS or PROGRAMS
8)Find the MOZILLA FIREFOX folder and click on it
9)Choose Mozilla Firefox (Safe Mode).
10)When the prompt box appears check the boxes next to the following:
a)Disable all add-ons
b)Reset toolbars and Controls
c)Reset all user prefrences to Firefox defaults
11)Click on the CONTINUE IN SAFE MODE BUTTON at the bottom.
If firefox opens, you have a plug-in that is causing your issue. If it does not then repeat steps 1-5 and then move on to step 12.
12)After all instances of firefox.exe have been ended, go to START and choose CONTROL PANEL from the start menu right hand side. XP users go to step 13...Vista users choose SWITCH TO CLASSIC VIEW on the left hand side then go to step 13...Windows 7 users choose USE LARGE ICONS from the drop down list at the upper right hand side then go to step 13.
13)Double click the WINDOWS FIREWALL icon (around the bottom of the list) and check to see if it is ENABLED. If it is not enabled, Enable it. Windows 7 and Vista users: Answer YES to enable this option ANYWAY, if you get a prompt warning of dual firewall conflicts then move on to step 14.
14)Find your security center icon in the taskbar, Usually next to the clock. Right-Click the icon and choose EXIT, DISABLE (Temporarily), or CLOSE.
15)Once you are sure that your Security Suite/Antivirus software is disabled, then Start Firefox in regular mode.
If firefox opens, you have a firewall or defense conflict and need to get your documentation to find out how to allow EXCEPTIONS to the software or internet access list. You can use firefox with these settings in the meantime, but you will not have antivirus protection. Free antivirus-only programs are available at the following locations:
-----http://antivirus.comodo.com/antivirus.php
-----http://free.avg.com
-----http://www.avast.com/free-antivirus-download
NOTE: If you choose to use an antivirus only program in conjunction with windows firewall, you must remove any other antivirus programs from your computer and restart the system BEFORE you install the new antivirus software or you WILL have problems with your system SPEED and FUNCTIONALITY. Do so by going to START then choose CONTROL PANEL then choose ADD OR REMOVE PROGRAMS in XP or PROGRAMS AND SETTINGS in Vista or Windows 7 then find you program in the list. Right click it and Choose UNINSTALL or REMOVE. Be sure to RESTART the system BEFORE you choose to install the new software.
If NONE of the above has worked, then you very likely have a corrupted installation or your system may be comprimised by RootKIT or Trojan infection.
Please download and complete a full scan with the tool below. REMOVE ANYTHING IT FINDS then restart the system and remove and reinstall firefox then attempt to open it again:
http://support.kaspersky.com/viruses/avptool2010?level=2
Good Luck to all. I hope that his has been helpful.
Gill
Senior Tech
PC VICE
-----www.pcvice.com

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Read the fixes and still having problems. Firefox will not open at all and I receive a crash report upon launch. Have restarted, shut down, run virus and malware checks and even tried downloading and reinstalling with no response. Please assist.

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