I can't launch Firefox or Thunderbird

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• I can't launch Firefox.

  When I try to launch Firefox, I simply will not open. I tried opening in Mode safe by holding Shift and clicking on Firefox - no luck.

  Please check that.

  You just updated recently? Sometimes during this process, the program files are damaged. Please try this:

  Clean reinstall it

  We use this name, but it isn't about deleting your settings, this is to ensure that the program, files are clean (not incompatible, corrupt or exotic code files). As described below, this process does not disrupt your existing settings. Don't uninstall NOT Firefox, that does not need.

  (A) download a fresh Installer for Firefox 40.0 of https://www.mozilla.org/firefox/all/ in an ideal location. (Scroll down your preferred language).

  (B) the release of Firefox (if any).

  (C) to rename the program folder, either:

  (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
  

  (D) to run the installation program that you downloaded in the #1. It should automatically connect to your existing settings.

  No improvement after this reinstall?

  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

• All of a sudden I can't launch firefox, message says: unable to load XPCOM, what should I do?

  Can't get on the line, the browser says "failed to load XPCOM" icon, what can I do? Help, please. I'm not very savvy computer. Please keep it very simple.

  This may be caused by an update of Firefox failure that left you with a mixture of old and update files in the Firefox program folder.

  Do a clean reinstall and delete the program folder before Firefox to (re) install a new copy of the current version of Firefox.

  • Download the full Firefox installation program and save the file to the desktop
    https://www.Mozilla.org/en-us/Firefox/all/

  If possible to uninstall your current version of Firefox to clean the Windows registry and settings in the security software.

  • Do NOT remove the "personal data" when you uninstall your current version of Firefox, because this will remove all profile folders and you lose personal data such as bookmarks and passwords including data profiles created by other versions of Firefox.

  Delete the program folder Firefox before installing newly downloaded copy of the Firefox installer.

  • (32-bit Windows) "C:\Program Files\Mozilla Firefox\"
  • (Windows 64 bit) "C:\Program Files (x 86) \Mozilla.
  • It is important to remove the Firefox program folder to delete all the files and make sure that there is no problem with the files that were the remains after uninstallation.
  • http://KB.mozillazine.org/Uninstalling_Firefox

  Your bookmarks and other personal data are stored in the Firefox profile folder and will not be affected by a uninstall and (re) install, but do NOT delete personal data when you uninstall Firefox which removes all Firefox profile folders and you lose your data.

  • http://KB.mozillazine.org/Profile_folder_-_Firefox
  • http://KB.mozillazine.org/Profile_backup
  • http://KB.mozillazine.org/Standard_diagnostic_-_Firefox#Clean_reinstall

• After installing Win7 x 32 SP1, I can't launch Firefox. Not even in safe mode. I uninstalled Firefox and re-installed the program. Does not start.

  After you have installed SP1 Firefox stop working and Internet Explorer stop working. I can only use Chrome as browser at the moment.

  See:

  • http://KB.mozillazine.org/Browser_will_not_start_up

  One possible cause is security software (firewall, antivirus) that prevents 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 and the plugin-container in the permissions list 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

  Do a check with some malware malware, analysis of programs on the Windows computer.
  
  You need to scan with all programs, because each program detects a different malicious program.
  
  Make sure that you update each program to get the latest version of their databases before scanning.

  • http://www.malwarebytes.org/mbam.php - Malwarebytes' Anti-Malware
  • http://www.superantispyware.com/ - SuperAntispyware
  • http://www.microsoft.com/security/scanner/en-us/default.aspx - scan Microsoft Security
  • http://www.microsoft.com/windows/products/winfamily/defender/default.mspx - Windows Defender: Home Page
  • http://www.safer-networking.org/en/index.html - Spybot Search & Destroy

  Alternatively, you can write a check for an infection rootkit TDSSKiller.

  • http://support.Kaspersky.com/viruses/solutions?QID=208280684

  See also:

  • "Spyware on Windows": http://kb.mozillazine.org/Popups_not_blocked

• Can not launch Firefox successfully because of the Mac application profile settings?

  The team, currently I am working for Oracle and must use Firefox to access our CRM applications.
  Whenever I run the firefox.app, I get the following error message?
  Could not initialize the safety component of the application. The most likely cause is problems with the files in the directory of the profile of your application. Please check that this directory has no restriction of read/write and your hard disk is not full or close to full. It is recommended that you exit the application and correct the problem. If you continue to use this session, you may see incorrect application behavior when you access security features.

  Am currently using OS X Lion - mountain
  Downloaded Firefox 21.

  Your comments would be very appreciated

  Give this command in a Terminal
  /Applications/Firefox.app/Contents/MacOS/Firefox-bin Pei

  Create a new profile 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

  Profile backup and restore

  • http://KB.mozillazine.org/Profile_backup
  • https://support.Mozilla.org/en-us/KB/back-and-restore-information-Firefox-profiles
  • http://KB.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

• Where can I download Firefox icons

  Where can I download Firefox and Thunderbird icons please? My platform is Ubuntu 12.04 and the last Thunderbird is installed for my emails.

  Note that there a Firefox icon (mozicon128.png) in the folder icons in the Firefox program directory if you have installed the version of Firefox from the Mozilla server.

• Firefox and Thunderbird 31.3.0 34.0.5 does not much. Can you tell me how to solve this problem in simple terms; I'm 68 years old.

  34.0.5 of Firefox and Thunderbird 31.3.0 slow down and show "not responding". I saw ways to fix it on Google, but I can't follow him. Is there a simpler way? It has been like that for about 5 months, and I was hoping that with each update, that it would fix itself. I used Mozilla for about 8 years, and this has never happened before.

  Launch the Task Manager in windows. (alt + Ctrl + delete) I remember when that rebooted computers.

  Open the process tab and click the CPU to sort by usage.

  On my windows machine 7, the two sit around the top with 1 or 2 percent of its use. Similar is yours? or are there competing processes from upward? Thunderbird perhaps 30% 30% Firefox and something else 30%

  I suggest you also want outdated plugins.
  In Firefox, go here. https://www.Mozilla.org/en-us/pluginCheck/

  Firefox and Thunderbird share the plugins in the registry, a single cheque must cover all.

  Also hold the SHIFT key at startup (this is the mode without application failure) If you do not see the problem, it's an add-on... look for the one that is used by Firefox and Thunderbird.

• MBPro stops during startup.  If I continually move the mouse during startup, it will go on my desk.  If I launch Firefox and try to do anything, it stops.  This can be corrected?

  Mac Book Pro stops unexpectedly during startup.  I can get it to go to my office, if I continually move the mouse during the boot, but after I launched Firefox and try to do anything, it will stop.  If I try to run the scans of security or reinstall OS X using the command + R and disk utilities, it stops.  Sometimes it gives me a box saying something about stopping with various options such as Cancel, stop, reboot, etc., but it makes no difference that I click on, she stops.  Sometimes, I get no warning at all.  This can be corrected?  I'm not savvy Mac.

  Reset the SMC could solve problem then.

  Reset the management system (SCM) controller on your Mac - Apple Support

  Also try the safe mode boot.

  Try safe mode if your Mac does not end commissioning - Apple Support

• I can't launch any Web site by typing in the address bar. It's going to happen when I press on enter. Get the latest update of Firefox on Ubuntu Maverick.

  I can't launch any website in the address bar of Firefox11. I can't type in the address of website below but if I press on enter nothing happen.

  In Firefox 4 and later Safe mode disables extensions and disables hardware acceleration.

  • http://KB.mozillazine.org/safe_mode

  Try turning off hardware acceleration.

  • Edit > Preferences > advanced > General > Browsing: "use hardware acceleration when available.
  • https://support.Mozilla.org/KB/how-do-i-upgrade-my-graphics-drivers

  Create a new profile as a test to see if your profile is the source of the problems.

  See "basic troubleshooting: a new profile:

  • https://support.Mozilla.org/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 > Modules > Extensions & Plugins" in case there are still problems.

  If this new profile works then you can transfer files from the old profile to the new profile, but make sure not to copy corrupted files.

  See:

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

• How to fix Firefox and Thunderbird when MozBackup broke?

  Hello.

  We are a small family business. My father, the head of the company, really liked software MozBackup and we use it for a long time now.
  About 2 weeks ago, we bought a new PC for our needs, and while I was configuring it to work, I encountered a major problem. I installed Win7 64 bit, all the drivers needed and software, including FireFox, ThunderBird and MozBackup. Everything was going well until we used MozBackup. FireFox is now having trouble with certificates - for example it shows problems with certificates not approved on Mozilla help sites, google etc. Some Web sites are displayed in plain text, in particular the support pages. Also, it does not play youtube videos - they're starting to buffer and then an error pops up. Uninstalling Firefox and deleting the profile manually do not help, when I run it again it stil has these issues. This stopped after you have reinstalled the OS, but I really don't want to do this again. Thunderbird shows that our private mail server's certificate is not approved, it also has problems with displaying certain messages (not reliable too). All other web browsers works fine. We checked today and it also happened on our new ultrabook with Windows 10, but when we updated Firefox and restored the profile with MozBackup on our old laptop - he didn't plant as on other computers. It seems to happen only with freshly installed Firefox and Thunderbird.

  Could you help us somehow? Is that caused new versions of these programs? I used FF and TB 38.4.0 42.0/43.0. Maybe you could just give me a solution to restore by default, so she would go as it has just been installed? Then we could migrate to Firefox Sync with our profiles.
  We would be very grateful for any help from you.

  See you soon.

  You have restored the cert8.db file?

  There are security software such as Avast and Kaspersky and BitDefender and ESET which intercepts secure connections and sends its own certificate.

  If you cannot inspect the certificate by "I understand the risks", then try this:

  Open the "Add Security Exception" this URL chrome by pasting into the address bar of Firefox and check the certificate:

  • chrome://pippki/content/exceptionDialog.XUL

  In the field of location of this window, type or paste the URL of the Web site.

  • retrieve the certificate via the button 'Get certificate '.
  • Click on the "view..." button. "to inspect the certificate in the certificate display

  You can check details such as the issuer and the certificate chain in the Details tab of the certificate display.
  Check which is the issuer of the certificate.
  If necessary, you can attach a screenshot that shows the display of the certificate.

• Launch Firefox on startup with Windows 10

  How can I make Firefox will automatically start up when I turn on my computer? At the moment it takes forever to start and I would like to go there as soon as I turn on the machine. I use Windows 10. Thanks in advance.

  Hi MontgomeryS, like previous versions of windows win10 has an autostart folder in the startmenu, where you can place shortcuts to programs - those who will be launched as soon as you connect to your account.

  Press windows + R and open %appdata%\Microsoft\Windows\Start Menu\Programs\Startup - then open the right file. You can then right-click on the icon of firefox on your desktop, copy it and then paste them into the startup folder.

• Command to close Firefox or Thunderbird with scheduled tasks?

  I would like to automate file Firefox (Thunderbird). Output of command at a specific time without forcing a shutdown/reboot of Windows. The goal is to ensure that they are not active during my automated nightly backup.

  Is there a command line - setting or other trick/tool can be used for this function?

  This could be a stackoverflow question or another developer network:
  For example:

  • http://superuser.com/questions/748523/how-can-i-quit-Firefox-via-command-l...

• Download several languages in firefox and thunderbird easier

  I use English and Dutch girlfriend in Thunderbird and Firefox.
  Alist various languages in Firefox and Thunderbird separately to be accessible easily would be much appreciated.

  Too much and too long at the present time research

  You can find all the installation programs for the various languages of Firefox here: https://www.mozilla.org/en-US/firefox/all/

  A similar page for Thunderbird is available here: https://www.mozilla.org/en-US/thunderbird/all.html

• Firefox and Thunderbird are suddenly not accept keyboard input

  Keyboard shortcuts, simply enter in any field of work continues to fail so I can still use ctrl + C / CTRL + V to somewhat use firefox and Thunderbird, but all fields are completely insensitive to the entries to the keyboard

  The problem occurred suddenly while I was browsing.

  I have the same problem on all programs based on the Gecko engine, and I confirmed their so far in Firefox, waterfox, instantbird, thunderbird and fossamail. However chrome / windows / basically everythign n

  To remedy this, I have tried the following:
  Restart firefox
  Restart of firefox in savemode
  Reset
  Change the type of keyboard in windows
  Using another keyboard
  Once again reboot
  Press F7 to check for insert mode that has been disabled
  by pressing the Windows key + F9 (whatever this is)

  I am running windows 8.1(x64)

  Resolved, change the type of keyboard again and restarting fixed. I tried to use the on-screen keyboard on which worked so I again changed the layout of the keyboard and rebooted and now it works fine. I still wonder what caused a large Gecko problem like that?

• Why both firefox and thunderbird to start in safe mode?

  Turned on my computer, run firefox and thunderbird as I always do, and they both started in safe mode. They both showed a box before opening it, who said that they are running in safe mode. Why would they do that?

  Hello, safe mode is when you press the SHIFT key during launch. Maybe you might have to look more closely at your keyboard if some of the keys are stuck our rates or try with a different material...