I can not open Firefox.

I can not open Firefox. When I click on the icon nothing happens. I tried rloading and this didn't help. I have been using Firefox for years and have never had this problem.

Hey gioele,
Sorry to hear your problem. I think somehow your profile has got corrupt. Uninstalling Firefox won't fix this problem. Please follow the instructions from the link below. Hope it's gonna fix your problem.
http://mzl.la/1AYgUR8

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I can not open Firefox due to a virus. Can I un-install and then re-install Firefox and save my original setup and favorites

I can not open Firefox due to a virus.
When trying to open Firefox, the program directed the computer to shut down, and prevented me from going into Safe mode.
The virus only affected Firefox and rebooting in Safe.
The virus has been scrubbed, but I get the crash report every time I try to open Firefox. Can I install a new version of Firefox and still keep my bookmarks/ How can I rescue my bookmarks.
I am posting this from another computer location.

I used to have a slightly similar problem. Not the Virus problem, but the re-install of Firefox. The solution for this in the future would be for you to install and use FEBE Firefox Environment Backup Extension so you can fully back-up your settings, and other Addons, and Themes etc. that were within your FEBE backed up profile, so you can do the re-install of Firefox and then restore your saved profile that encompasses all of or most of what you presently don't want to loose. You could still do a FULL PROFILE FEBE, and re-install Firefox, and do a FULL PROFILE RESTORE, and if you might no longer have a virus problem after the restore. If so, your in good shape. I would find and run a good quality Anti-Virus scan, and if you wish to try to catch what you might have missed with the new scan I also suggest from www.IOBit.com that you add 2 programs that look to be better at catching problems than most other scan and repair utilities. The programs I suggest you add are called Advanced System Care - presently is version 5, and IOBit Malware Fighter, and one other. Their super powerful Smart Defrag that is faster than most Defrag programs and their is only one other Defrag program that comes close to it's power, and that is Diskepper, and you get Smart Defrag for free, and it's better, and faster than the others in my opinion. ASC Advanced System Care will clean your system and make it run faster specially if you have noticed it is slowing down for one reason or another , and it will do this with less resources than the other programs that you may already be using. The only thing they lack at present is an Anti-Virus portion which would add much more value to the already super programs. Good Luck. Let me know what you think after trying the noted programs. You should be very satisfied of the results.

I can not open Firefox. Keep getting the error message "Failed to read the configuration file. Please contact your system administrator." What do I do?

I can not open Firefox. I keep getting the message "Failed to read the configuration file. Please contact your system administrator." I have tried uninstalling Firefox and then reinstalling it but without success. What should I do?

Which Fx version? When you uninstalled Fx, did you reboot computer before reinstall?
Also, check for / delete any leftover files in the Fx programs install folders, before reinstall?
Is your profile in the default location or custom location?
Have you tried creating a new, completely clean profile - to test (then make sure to select that profile to start Fx - from the Profile Manager)? (no addons or plugins installed).
Does the user acct (that Fx fails under) have access ("rights") to all locations - especially for Fx profiles location?

Downloaded Firefox 4 to my Mac OS10.5.8 and now can not open Firefox.

Downloaded Firefox 4 to my Mac OS10.5.8 and now can not open Firefox. The processor is 1.25 GHz Power PC G4 and 768 MB DDR SDRAM memory. Is it possible to go back to an earlier version that was running very well on my Mac?

Firefox 4 requires at least OS X 10.5 and an Intel Mac. There is a third party version of Firefox 4 that runs on OS X 10.4/10.5 and PPC Macs, for details see http://www.floodgap.com/software/tenfourfox
If you prefer, you can get the latest version of Firefox 3.6 from http://www.mozilla.com/en-US/firefox/all-older.html

Operating System Window XP Professional. I can not open Firefox. I have reset it and it worked for a few days. Now I can not execute it. Appreciate help.

Can not execute Firefox. So I updated it and reinstalled it. Then I reset it. For a couple days it worked fine. Now I am back to square one. Can not open firefox again.

Certain Firefox problems can be solved by performing a ''Clean reinstall''. This means you remove Firefox and any leftover program files and then reinstall Firefox. Please follow these steps one by one:
#Download the latest Desktop version of Firefox from http://www.mozilla.org and save the setup file to your computer.
#After the download finishes, close all Firefox windows (click Exit from the Firefox or File menu) and confirm all upcoming messages.
#Now, uninstall Firefox by following the steps mentioned in the [[Uninstall Firefox from your computer#w_uninstall-firefox|Uninstall Firefox]] article.
'''IMPORTANT:''' On Windows, the uninstaller has the option to remove your personal data and settings. Make sure that you do '''not''' check this option; otherwise all of your bookmarks, passwords, extensions, user customizations and other Firefox [[Profiles|user profile data]] will be removed from your computer.
After uninstalling Firefox on Windows, delete the "Mozilla Firefox" program folder, located by default in one of these locations:
* '''(On 32-bit Windows)''' ''C:\Program Files\Mozilla Firefox''
* '''(On 64-bit Windows)''' ''C:\Program Files (x86)\Mozilla Firefox''
#Go to the Windows Start menu and click on "Computer".
#In the Explorer window that opens, double click Local Disk (C:) to open the C:\ drive.
#Find the "Program Files (x86)" folder or "Program Files" folder.
#* On 32-bit Windows, double-click the '''Program Files''' folder to open it.
#* On 64-bit Windows, you will see a "Program Files (x86)" folder AND a "Program Files" folder. Open the '''Program Files (x86)''' folder.
#Look for a '''Mozilla Firefox''' folder. If you find one, right-click it and select ''Delete'' and confirm that you want to move the folder to the Recycle Bin.
Now, go ahead and reinstall Firefox:
#Double-click the downloaded installation file and go through the steps of the installation wizard.
#Once the wizard is finished, choose to directly open Firefox after clicking the Finish button.
Please report back to see if this helped you!

I can not open firefox when I leave the program is tells me that firefox is still running and will not open

#
I can not open firefox when I leave the program is tells me that firefox is still running and will not open
# Details
BoldItalicInsert a link...

Because Firefox sucks that way. I have the same problem. Royal pain in the @$$. I have to use the task manager to duck out of it, or you have to w8 & count to 10...lol. Stupid program.

Can not open Firefox application - not supported on this archetecture

I have been able to use Firefox in the past, but when I tried upgrading to FireFox 4, I get an error msg: that it is not supported on this architecture.

Today, I have a new test result that the user account is allowed to access internet, but still can not access D drive.
The user can not change the IE's internet temporary files location.
I can not open the flex application from yahoo server.
Is there any method to execute flex application without temporary files support?
Thank you very much.

Proxy server is refusing connection. Can not open Firefox to scan for problem

I keep getting an error message: "Proxy server is refusing connection."
I can not access Firefox due to this message.
I went to Firefox site and ran the diagnosis scan with no success to clear symptom.
Running Windows 7 Home premium
I have Mcafee virus protection.
I have not knowingly connected to a proxy server.
I have two PC's running on a Cisco Systems router and the other PC is not having this symptom.

If you do not need to use a proxy to connect to internet then select "No Proxy"
See "Firefox connection settings":
* [[Firefox cannot load websites but other programs can]]

I can not open firefox. Recieve message: "Couldnt find mozilla runtime". Can you help me?

I find file "mozilla runtime exe" under removed files in directory "removed files". What does it means?

Certain Firefox problems can be solved by performing a ''Clean reinstall''. This means you remove Firefox program files and then reinstall Firefox. Please follow these steps:
'''Note:''' You might want to print these steps or view them in another browser.
#Download the latest Desktop version of Firefox from http://www.mozilla.org and save the setup file to your computer.
#After the download finishes, close all Firefox windows (click Exit from the Firefox or File menu).
#Delete the Firefox installation folder, which is located in one of these locations, by default:
#*'''Windows:'''
#**C:\Program Files\Mozilla Firefox
#**C:\Program Files (x86)\Mozilla Firefox
#*'''Mac:''' Delete Firefox from the Applications folder.
#*'''Linux:''' If you installed Firefox with the distro-based package manager, you should use the same way to uninstall it - see [[Installing Firefox on Linux]]. If you downloaded and installed the binary package from the [http://www.mozilla.org/firefox#desktop Firefox download page], simply remove the folder ''firefox'' in your home directory.
#Now, go ahead and reinstall Firefox:
##Double-click the downloaded installation file and go through the steps of the installation wizard.
##Once the wizard is finished, choose to directly open Firefox after clicking the Finish button.
Please report back to see if this helped you!

I updated mozillo firfox and now i can not open firefox. i have tried everything, uninstall and intall, tried to read other peopl's recommendation, nothing work

I updated firefox 27.0.1(x86.en-US) two days ago and now it is not opening. please help me, it is frustrating. I have been using firefox for a long time and I have saved a lot. can you please help me. I have checked under firewall and Mozilla firfox is not blocked. I have read every recommendation I could get to fix the problem but not working. I have windows 7

One of the suggestions probably was to try starting Firefox in its Safe Mode by holding down the shift key when starting Firefox. (This doesn't work if Firefox is still running hidden in memory.)
In the small dialog that should appear, click "Start in Safe Mode" (''not'' Reset)
Any luck?
Also, I will message you a link to download Firefox 27.0, in case the problem is unique to Firefox 27.0.1.

Can not open firefox

I shut off my computer to allow updates to my norton security
and now when I click on the firefox icon it does not open.
I have important information that I need.

Hi,
Maybe this is just a one-off solution:
* Open taskmanager (ctrl + shift + esc in vista)
* Go to "processes"-tab
* Search and select firefox.exe
* Click on the button "end task"
* Try to open firefox again
Kind regards,
Joren
''Edit: I think the link silkphoeni... posted is more complete.''

I can not open firefox or uninstall it

When I try to open firefox it won't open, when I try to unistalo it, I get a prompt telling me I need to close firefox, even though the browser is not open.

-> Open Task Manager -> Processes panel -> right-click firefox.exe and click End Process Tree -> Close Task Manager
-> Uninstalling Firefox
* https://support.mozilla.com/en-US/kb/Uninstalling%20Firefox
-> Installing Firefox on Windows
* https://support.mozilla.com/en-US/kb/Installing%20Firefox%20on%20Windows
Check and tell if its working.

Firefox4Life78: can not open firefox

Hi, spoke with 3 techs today and found no solution to the problem. I even went as far as purchasing the Malwareby Anti_malware and found NO problems. I still cannot open firefox when clicking on the icon. It has been un-installed and re-installed.
please email me if there is a solution
== Operating system ==
vista

Did you try running it in Safe Mode?
Start->Programs->Mozilla Firefox-> Mozilla Firefox (Safe Mode)
Have you tried to create a new profile?
The techs can help you to do so if you haven't yet.
Does it give an error message when you click the icon?
Have you checked hard drive for errors/bad sectors/etc?

I can not open firefox, i updated it to 8.0 now it does not work i tried to unblock it with my firewall but still its not opening.. i need help

it does not crash or close unexpectedly cause it does not open at all i click on it but nothing happens..

See:
*http://kb.mozillazine.org/Browser_will_not_start_up
*http://kb.mozillazine.org/Error_loading_websites

I updated and now I can not open firefox

I installed the damn update you sent and now I can't get Firefox open

What exactly happens when you double click the Firefox icon? Does it display any kind of error-message? And could you please start Firefox in [[Safe Mode]] to make sure that no customization is responsible for the issue?

I can not open Firefox.

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