I updated firefox 3.6.10 to 3.6.11 and rebooted... when back connected in firefox does not start and gives an error saying 1.9.10 aren't compatible wth 1.9.11

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• 9.01 Firefox does not start, has a dialog box saying: it is still ongoing.

  Does anyone have ideas with the following Firefox Vista problem.

  9.01 Firefox does not start, has a dialog box saying: it is still ongoing.

  There is no instance of firefox in the Task Manager.
  I uninstalled firefox and reinstalled both of
  Desktop mode and course in vista.

  I have deleted all instances of firewall.

  I tried with firewall failure

  Still having the same problem

  Solved by uninstalling all the firefox - including my settings

• Firefox does not start after the upgrade: error code 2324

  I updated Firefox on my desktop running Windows 7 Enterprise (64-bit). Installer stub downloads and works through the installation, but does not automatically start Firefox. If I click on the link in the task bar, nothing happens. Same thing with that pinned to the start menu. If I go to the Mozilla folder and load Firefox from there, I get a message saying "Setup has encountered an unexpected error installing this package. This may indicate a problem with this package. The error code is 2324. »

  Hello

  Some Firefox problems can be solved by performing a clean reinstall. This means that you remove Firefox program files, and then reinstall Firefox. Please follow these steps:

  Note: You can print these steps or consult them in another browser.

  1. Download the latest version of Firefox from http://www.mozilla.org office and save the installer to your computer.
  2. Once the download is complete, close all Firefox Windows (click on quit in the file menu or Firefox).
  3. Remove the Firefox installation folder, which is located in one of these locations, by default:
     • Windows:
       • C:\Program Files\Mozilla Firefox
       • C:\Program Files (x 86) \Mozilla Firefox
     • Mac: Delete Firefox in the Applications folder.
     • Linux: If you have installed Firefox with the distribution-based package manager, you must use the same way to uninstall: see Install Firefox on Linux. If you have downloaded and installed the binary package from the Firefox download page, simply remove the folder firefox in your home directory.
  4. Now, go ahead and reinstall Firefox:
     1. Double-click on the downloaded Setup file and go through the steps in the installation wizard.
     2. Once the wizard is completed, click to open Firefox directly after clicking the Finish button.

  More information on the resettlement of Firefox can be found here.

  WARNING: Uninstaller or the use of Firefox and not run a third remover as part of this process, because who could permanently delete your Firefox data, including but not limited to, extensions, cache, cookies, bookmarks, personal settings and passwords saved. These can be recovered, unless they have been backed up on an external device!

  Please report back to see if this helped you!

  Thank you.

• Firefox does not start "XPCOM" message pop up, my user and passwords! ??

  My window 7 was not starting up properly so I did a system restore and now firefox does not start a message appears indicating "XPCOM" and I googled and all is said to reinstall Firefox. I don't usually to reinstall immediately because I need my passwords and username back. I can't find a solution on the forums, or if there is I have not found or I simply did not understand the solution itself. Please get back to me as soon as possible

  Thank you!

  Is a restoration of the system to a cancellation of the recent updates or something more radical?

  You can do the following type of reinstall without touching your settings files. Important: uninstall NO Firefox first. That is not necessary.

  Clean reinstall it

  (1) download a fresh Installer for Firefox 36 of https://www.mozilla.org/firefox/all/ in an ideal location. (Scroll down your preferred language).

  (2) the release of Firefox.

  (3) to rename the program folder

  (Windows 64-bit folder names)

  C:\Program Files (x86)\Mozilla Firefox
  

  TO

  C:\Program Files (x86)\OldFirefox
  

  (Windows 32-bit folder names)

  C:\Program Files\Mozilla Firefox
  

  TO

  C:\Program Files\OldFirefox
  

  (4) run the installer you downloaded in the #1. It should automatically connect to your existing settings.

  When you start Firefox, you may need to use the Profile Manager to return to your regular profile. Ignore: copy/paste glitch.

  Any improvement?

  Note: Some plugins can only exist in this OldFirefox file. If it is missing something essential, present in these files:

  • \OldFirefox\Plugins
  • \OldFirefox\browser\plugins

• I get this error message and Firefox does not start... EXC in ev handl: error: error definition property on NPObject!

  Firefox does not start and this message keeps coming back... I uninstalled and reinstalled... but nothing helped...

  EXC in ev handl: error: error definition property on NPObject!

  Disable the extension "McAfee Site Advisor" who has just updated 3.4.0 that probably out of block of addons list.

  • 'Ctrl + Shift + A' > find McAfee Site Advisor and use 'Disable', and then restart Firefox.
  • Do a Google search without problem
  • It seems that if you re - enable new Site Advisor and restart Firefox you agree. At least you know where to look if you get the error again, or research on Google to slow down.

• Firefox does not start - claims that it is already open

  Firefox does not start. He claims to be already running, but that doesn't seem to be the case.

  I tried to create a new user profile, but when I try to open Firefox now, the menu "choose user profile". I tried the new profile and they old, and both give the same error message. "Firefox is unable to use the"Default user"profile because it is in use. To continue, close the Runspace of Firefox or choose a different profile. »

  There is an entry for firefox.exe in the menu of "details" to my task manager and nowhere else. When I try to put an end to this task, I get the following error: "the operation could not be performed - access denied."

  Due to some troubleshooting research, I tried to delete the parent.lock my profile folder, but I get this error: "the action cannot be completed because the file is opened in Firefox."

  I tried to transfer my bookmarks and preferences from Firefox to Chrome, but I had a similar error suggesting that Firefox was already open and I have to close first.

  I also turned off my computer and uninstalled and reinstalled Firefox several times.

  I'd really rather not lose all my bookmarks Firefox, modules, and preferences. I also prefer to use Firefox for Chrome, so if anyone can help me I would really appreciate it. I don't know what else to try.

  My PC runs Windows 10, incidentally.

  Try to delete the parent.lock file in the Firefox profile folder.

  • C:\Users\ < user > < profile > \AppData\Roaming\Mozilla\Firefox\Profiles\.
  • http://KB.mozillazine.org/Profile_folder_-_Firefox

  See:

  • http://KB.mozillazine.org/Profile_in_use
  • https://support.Mozilla.org/KB/Firefox+is+already+running+but+is+not+responding

  What security software do you have?

  Try to create a new shortcut on the desktop Firefox and maybe to reinstall Firefox via a clean reinstall (i.e. remove the Firefox program folder).

  If you cannot remove the Firefox program folder and then try to rename this file to "Mozilla Firefox.old".

  • (Windows 64 bit) "C:\Program Files (x 86) \Mozilla.
  • (32-bit Windows) "C:\Program Files\Mozilla Firefox\"

  Start the computer in Mode safe mode with network support Windows (on the startup screen, press F8) to see if that helps.

  • http://www.bleepingcomputer.com/tutorials/how-to-start-Windows-in-safe-mode/
  • http://www.7tutorials.com/4-ways-boot-safe-mode-Windows-10

• Mozilla Firefox does not start

  My Firefox does not start. I've tried the upgrade, the problem still persists. The icon is there, but nothing happens when I press it.

  Hi Dick3974,
  Please reinstall Firefox for Android from Google game store and see if this problem persists.

  We look forward to your response.

• Firefox does not start after the computer restarts

  Install Firefox, works great. Restart the computer, Firefox does not start, or finally when it tries to start the script errors occur. If I reinstall Firefox after restart of a computer, it works fine, once again when the computer is stopped at the next startup it is, will not be able to use Firefox. Firefox does not start in Firefox Safe mode, does not start in windows safe mode. Do not add now, nothing has been added, just the Firefox installer played complete the system restore on the computer, same problem. Windows 7 Pro. Remove Firefox from windows control panel, restart your computer, install firefox, will take place. shut down the computer, put on the computer, firefox does not start, or crashes. I am exploring now Web interface.

  I reinstalled Firefox, so it will run in order to perform the steps below.

  Here is the answer which took care of the problem,

  http://KB.mozillazine.org/Browser_will_not_start_up#Problematic_plugin_prevents_browser_from_starting

  "Site Web TrueSuite Log On" plugin (AuthenTec), is the question.

• After that restart of firefox does not start. is running in the Task Manager, but won't pop up. Reset safe mode and uninstall/reinstall won't help. OK so no reset.

  Win7 Pro. has worked ok firefox. but lately with 25 and 26 now, firefox does not start. I see that firefox is running in the Task Manager. but it will not just appear.
  If I still download and install it, it runs, but every time I restarted the system, it just does not work yet.
  Reset try:, safe mode, uninstall & reinstall, new/clean profile none of these work.

  
  

• Firefox does not start (not safe mode), but uses the CPU

  I have the latest Firefox 25.0 (and the last Flash 11.9.900.117) on Windows 7 and the following behavior is reproducible. It started not too long ago.

  At first when I launch Firefox, nothing appears no matter how often, I restart. I see in the list of the process firefox.exe to 25% of the CPU, 2 x FlashPlayerPlugin_11_9_900_117.exe (CPU 0%) and plugincontainer.exe. No matter how many times I killed all of them, would not restart Firefox.

  The following also not help in this situation:

  • Starting in normal safe mode: Firefox opens a window but immediately freezes and does not respond. The process list shows the same process even if I find the unexpected FlashPlayer.
  • Disable plugincontainer: same results (just without plugincontainer.exe)
  • Uninstall Flash: Same results (just without FlashPlayerPlugin)

  The following can start Firefox only once:

  • Starting in SafeMode but select "Reset Firefox": Firefox does not start right away, however. Nothing happens, and you have to kill the process. However the very next time you launch Firefox in the normal way, it works fine (but it shows FlashPlayerPlugin.exe in the list of unopened Windows process despite the tab). Unfortunately, after closing Firefox the process (Firefox, FlashPlayerPlugin) are not deleted. I kill and the problem with Firefox do not leave reappears.

  In case you use "clear history of Firefox closing:

  • do not delete Cookies

  Note that compensation "Preferences of Site" clears all exceptions for cookies, images, windows pop up, installation of software and passwords.

  Use "Firefox > output" (Windows: Firefox/file > quit;) Mac: Firefox > quit Firefox. Linux: Firefox/file > exit) to close Firefox if you are currently doing by clicking on the X close in the title bar of Firefox.

  Create a new profile manually (and not via the reset) as a test to see if your profile is the source of the problems.

  See "create 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 files from a profile in the new profile, but be careful not to copy files corrupted to avoid transporting on the problem.

  • http://KB.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

• Firefox does not start. Error oxc0150004

  Firefox will not start. I uninstalled and reinstall.
  Nothing has changed. I have used Firefox for years. This first
  time, I have a problem.

  Hey Horrie.

  Have you tried to start Firefox in Mode safe? Key 'shift' startup of Firefox. If the accident is not in Mode without failure, you should read the extensions, themes and problems of hardware acceleration to resolve common troubleshooting Firefox problems.

  There are also a lot of useful things in the article Knowledge Base of Firefox does not start . If you have recently upgraded, you can check out this article as well.

  Hope this helps!

• Firefox does not start because he says that it's another instance that runs in the background, but I checked and it is not a!

  Firefox does not start because he says that it's another instance that runs in the background, but I checked and it is not a! I have Linux Fedora 15 and I'm not the root. I spoke to the Manager and he said I should delete a file in the folder where firefox is installed and which can solve the problem. Can you help me?

  Thanks, Marius
  

  Upgrade your browser Firefox 8 and check

  • getfirefox.com

• After that update of windows 64 bit system Firefox does not start

  I've updated to IE 10 and it should be updated to complete. My preference is Firefox, but it does not start and produces an error box telling me that Firefox could not start, it also sends you a report of failure.
  It happened in a previous windows update and to reolve that I go back to an earlier era. I don't want to do that this time, I want to use 10 IE and Firefox. If you are unable to solve this I have to use IE 10, it is so much faster now.

  Yes thanks - please start firefox in safe mode (by pressing the shift key, while it launches) and go to firefox > options > advanced > general & disable hardware acceleration.

  for some information about this, you can also look at bug #812683

• Firefox does not start, the Profile Manager is not available

  Firefox worked, then update it does not start. I tried all the fixes; However, the Profile Manager is not accessible or even present in the execution file. I unintalled and reinstalled several times, but I still can't get it to work. There is no Windows or Norton firewall block so I do not understand. What can I do? I want to use Firefox because it's the best browser; but now I'm forced to use Oscar. It's not terrible, but I prefer the features I've had with Firefox

  I had upgraded to the latest version; but the thought of demotion to the version which worked perfectly. In the end, I had to defrag, do a registry clean and optimization of performance of PC, but for the upgrade launched. So, I'm happy to say that I reply to this post with my Firefox browser. Thank you very much for your help. If all goes well, I won't have problems.
  DoubleD52

• Firefox does not start until the wifi is active

  I'm trying to use the latest firefox (v32) on Debian/testing/64-bit by using the 64-bit version of FF... This machine is a laptop and is used only with wifi. The wifi that is usually used is a Starbucks or McDonald's who require a click on a Web page before the connection is enabled... When I start FF to be able to select this check box, it does not start. a look at the ps - xua shows firefox as a zombie/missing process... How I work around this, is to use Google Chrome to shoot to the top of the Web page, click on the box, then almost immediately the instance FF I tried to launch rises... If I clicked on the icon of the FF once more, I get more window a FF... It seems that FF needs a pipe open to internet before it will start. I prefer FF on Chrome, but if I have to use Chrome to "Kick-start" FF, I might as well delete FF and just use Chrome... Any ideas?

  UH... This problem occurs on Linux... It IS not IE (thank God)... The proxy on FF and Chrome settings are identical, namely NO proxy configured...

  I've come up with a workaround.. Switched out the Linux drive with my pretty unused Windows 7 disk.. Where this problem with Firefox doesn't occur.. I'll check back in a few months with FF on Linux and see if one of the endless "updates" has magically fixed this problem.. Thank you for the help anyway..