Firefox does not start in Windows 8 and none of your suggested solutions worked

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• Firefox does not start what is happening and how can I solve this problem?

  I click on the link office or one in my Start menu and it will not open and does so even literally take 20 minutes. More when I close it looks closed, but when I try to reopen it, a window appears saying that Firefox still works when it is actually not. I have to restart my computer everytime to get it working again.
  My default browser still works fine and so did Fire Fox until a few days ago.

  One possible cause is security software (firewall) that blocks or limits Firefox or plugin-container process without informing you, possibly after the detection of changes (update) for the Firefox program.

  Delete all rules for Firefox in the list of permissions in the firewall and leave your firewall again ask permission to get full unlimited access to the internet for Firefox and the plugin-container and the update process.

  See:

  • https://support.Mozilla.org/KB/server+not+found
  • https://support.Mozilla.org/KB/firewalls

• 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

• 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 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

• 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.

• Windows wars Napoleon Cossacks 8. I install the game install the patch but it does not start, just flashing screen and that's it. has tried everything what is possible. D what can I do to read. ?

  I install the game install the patch but it does not start, just flashing screen and that's it. has tried everything what is possible. D what can I do to read. ?

  Wednesday, April 15, 2015, 17:56:29 + 0000, PhilipMallard wrote:

  I bought a Windows 8.1 today and wish I hadn't! It's a pain to use (I had a Windows 7 previously). None of my games of Cossacks work on windows 8.1 either and I've tried them in compatibility mode. Is it possible to install Windows 7 on my new computer and replace the disastrous 8.1 version?

  I would like to point out something that you may not realize: Windows 8
  has two interfaces; the modern/Metro Interface (which may be all the)
  you have looked at) and the traditional desktop Interface. You can use
  one or both. This traditional desktop Interface is almost
  identical to the interface of Windows 7. the biggest difference is that
  There is no Orb start clicking to bring up the start menu.

  But note that you can get the ORB start by using one of the many
  third-party programs, are free or very cheap (the classic interface
  http://classicshell.sourceforge.NET/ and debut8 to
  http://www.stardock.com/products/start8/; my personal preference is
  Debut8, but they are both very good).  And goes from an interface to
  the other is very easy; There are several ways, but simply by pressing
  the Windows key is perhaps the easiest.

  Just install one of these two and using the traditional desktop computer
  interface may be a better choice for you than going to Windows 7.
  I use Windows 8, almost exclusively with traditional workstations
  the interface and with 8 Start installed. If you were to look at and use
  my computer, you may have a hard time realizing that it is not
  Windows 7.
  I also recommend to read "how to make Windows 8 or 8.1 watch and.
  Want Windows 7 "to http://www.howtogeek.com/elk/298/45121/4206
  I can't address the issue with your games, except to say that
  whenever you move to a new version of the operating system, some of
  which is used to run on the former does not work on the new. And it's
  much more likely with utilities and games with companies
  applications.

• Since a windows 10 update on 09/12/15 my lightroom app will does not start I tried signing and return in, restart, reload the application, it will not start either from the desktop or the app cloud have other people encountered this problem?

  Since a windows 10 update on 09/12/15 my lightroom app will does not start I tried signing and return in, restart, reload the application, it will not start either from the desktop or the app cloud have other people encountered this problem?

  Hi rogerk94701487,

  Could you please check the event viewer and let me know the path of the defective Module once.

  How to check the event viewer: Photoshop CC 2015 crashing very frequently

  Kind regards

  Tanuj

• 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

• 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

• 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.

• 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!

• 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

• Satellite C55 - Has - 1 L 0 does not start in Windows 8

  Hey guys.
  I hope you can help me a bit.
  I have a Toshiba Satellite C55 - has - 1 L 0 here and it does not start in Windows 8.

  I turn it on, the Toshiba start screen appears, and then I get a message on a black screen saying "media control" (failure) and after a little while "no boot device. Please restart.

  I checked the BiOS and it does not see the hard drive (said HARD drive - no) and even in the boot order list, I don't get a list with the DVD drive with the exact name, but for the HARD drive.
  I tried to do a recocery with the F12 key and get the list to choosw where I want to start but by selecting the disk hard does not work.

  So I thought I'd try a live distribution of linux to see where is my hard drive and back up my data (after some settings in the BIOS - boot CMS mode) but I can't find there too. (I have a file fstab and mtab, it would help if I posted it here?)
  Is my HARD drive broken? Can I try something else?

  Thank you very much!

  You are right. This issue should be fixed by the authorized service provider.
  Furthermore, why do some risk steps to check this problem, if the warranty is valid.
  Warranty will cover the repair costs.

  Addresses and phone numbers, you can find on http://www.toshiba.eu/innovation/generic/ASP_SUPPORT/

  Good luck.