Firefox does not start. After starting the browser, it shows that it is running in the Manager of tasks for a while, but then it disappears.

Similar Questions

• 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, the error xul.dll thowing

  Hello!
  Stupid Flash plugin crashed my browser, and now efforts to launch the Firefox browser leads to the following error:
  Head: 'firefox.exe - Entry Point not found ".
  Text: "the procedure entry point not found hb_ot_layout_table_get_script_tags in the C:\Program Files (x 86) dynamic link library \Mozilla Firefox\xul.dll."

  And when I click on the 'OK' button, the following error: "unable to load XPCOM. And now it is all browser activity. In the installation folder (C:\Program Files (x 86) \Mozilla Firefox\) xul.dll and other files, including updater.exe, had changed their attribute "update" at the time of the accident of the latter. Dr.Web cureIt utility found no virus there. So, I think, I have to reinstall the browser.
  Is it possible to fix Mozilla with the record of my history and bookmarks? I backed up my profile folder (method of copy - paste), so how can I reinstall the browser and then restore my profile?

  Firefox starts when your computer is in the network connections of the spirit of the mode safe mode enabled?
  
  If this is not the case, try the following steps.

  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.

  The report please come back shortly.

• Firefox does NOT start, the removal and resettlement will start as the last step, but once Firefox is closed, it does NOT restart.

  Both browsers (Firefox 21 & IE) installed on my Widows XP 64-bit office refuse to start or click the icon on the desktop, the start menu bar or the executable files themselves. What happens is that all the icons disappear from the screen for 15-30 seconds, then the icons appear on the screen, and the last information message displayed from the system tray at the beginning upward is repeated.

  Firefox deleting and reinstalling will start the browser as the last step, but when the new copy is closed, it will not start. Also just restart the download installation without removing Firefox will be 'Upgrade' and start in last step, but when the new copy is closed, it cannot be restarted. Restore running on the new copy has apparent effect on the ultimate inability to restart after closing.

  I've only tried the Internet Explorer browser after being unable to start Firefox (its only usually used by States to update procedure) and have not studied either reinstall or repair.

  Did you use programs that I listed? All anti-malware programs to detect different things.

• Why Firefox does not start the meeting online Lync more when the update to version 21.0?

  The 20 version worked well. The only and only choice now is "get out me of here." Renew the certificate, but even "I understand the risks" has not helped in version 21. Now, I have to run IE to get the open online dating.

  Hello Seppva, please try this: enter Subject: config in the bar firefox address (confirm the message information where it appears) & search for the preference named plugins.load_appdir_plugins. Double-click it and change its value to true (a restart of the browser may be needed later for the change to take effect).

  some information on the issue are explained in http://www.ghacks.net/2013/05/15/why-you-may-have-lost-access-to-plugins-or-extensions-in-firefox-21/

• 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 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

• Firefox Pei does not start the Profile Manager. Firefox version: 50.0

  Firefox Pei does not start the Profile Manager. Firefox version: 50.0

  Have you tried; Type of topic: profiles in the address bar.

• 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

• 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 open after the update. Cannot open the profile technical, even when you use the directory in cmd line path

  I'm using Firefox on a Windows 7 computer. Firefox does not open after the last update. I read the help articles and it seems that I need to create a new profile because my settings were probably corrupted. I'm unable to open the profile technical, even when you use the directory in cmd line path. I tried the following commands in the command line:

  Firefox Pei
  "C:\Program Files (x 86) \Mozilla" PEI

  Nothing happens with every order.

  I am also running Norton Internet Security. I read a help of virtual navigation features Re article that can cause a problem. The article says to check the setting of virtualization in the internet security software and to clear the virtual cache. I went through all the menus of settings in Norton Internet Security version 21.6.0.32 and I don't see anything that looked like in "virtualization" settings, so I guess that does not apply to me. "

  If you have any ideas, I had appreaciate that your expertise!

  Hello arcandl, at the launch of the firefox is not after you double-click the shortcut, it is sometimes also a sign of active malware on a system.
  you might want to try running a scan with some various other security like the free version of malwarebytes and adwcleaner tools that are specialized to remove the adware and browser hijackers.

  Fix Firefox problems caused by malicious software

• 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. 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!