Firefox Lockwise. Take the passwords you’ve saved in Firefox with you everywhere. Download for iOS; Download for Android; Support; Firefox Monitor. See if your personal info has been leaked online, and sign up for future breach alerts. Click Download Firefox. Note: If you want to have a choice of the language for your Firefox installation, click the Download options and other languages link instead. Once the download has completed, the file (Firefox.dmg) may open by itself and pop open a Finder window containing the Firefox application. Djay hustle and flow.
This article describes what to do if Firefox doesn't open when you click the Firefox icon.
- If you get a message you can dismiss (e.g. 'TypeError: Components.classes['@ . ;1'] is undefined', 'onload error TypeError: .', 'Exc in ev handl: .') and can open Firefox, see Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems.
- If Firefox starts but won't load any websites, see Websites don't load - troubleshoot and fix error messages.
The Refresh Firefox feature can fix many issues by restoring Firefox to its default state while saving your essential information. Consider using it before going through a lengthy troubleshooting process. The Firefox Safe Mode window includes a Refresh Firefox option. You can start Firefox in Safe Mode by holding down the shift key while starting Firefox.holding down the option key while starting Firefox.quitting Firefox and then going to your Terminal and running:
You may need to specify the Firefox installation path (e.g. /usr/lib/firefox)
firefox -safe-mode
You may need to specify the Firefox installation path (e.g. /usr/lib/firefox)
Table of Contents
- 1Specific error messages
- 2No error message
Mozilla Crash Reporter
If you get the 'Mozilla Crash Reporter' window when you start Firefox, see Firefox crashes - Troubleshoot, prevent and get help fixing crashes for solutions.
Firefox is already running but is not responding
See 'Firefox is already running but is not responding' error - How to fix for solutions.
Your Firefox profile cannot be loaded. It may be missing or inaccessible
Firefox 1.0.2 Download
See How to run Firefox when your profile is missing or inaccessible for solutions.
Failed to read the configuration file
This error is caused by a problem with Firefox program files. The solution is to remove the Firefox program and then reinstall Firefox. (This will not remove your passwords, bookmarks or other user data and settings which are stored in a separate profiles folder.)
- Uninstall Firefox.
- Delete the Firefox installation directory, found in one of these locations by default:
- C:Program FilesMozilla Firefox
- C:Program Files (x86)Mozilla Firefox
- Use another browser to download the Firefox installer from the Firefox download page and install it. See How to download and install Firefox on Windows for details.
XULRunner - Error
Mac vlc player download free. If you see the message, 'XULRunner - Error: Platform version <x.x.x.x> is not compatible with minVersion <x.x.x.x>' ('<x.x.x.x>' depends on version number), after a software update, use another browser to download the Firefox installer from the Firefox download page, save it to the desktop or other location, delete the Firefox installation directory and then reinstall Firefoxreinstall Firefoxreinstall Firefox.
- If Firefox still does not start, see the Firefox will not start after updating section below.
There was an error launching the application
This error indicates that either Firefox is not installed or your shortcut to it is incorrect. Make sure that Firefox is installed at the location specified by the shortcut. If it isn't, install Firefox if necessary, then modify the shortcut to point to the correct location.
Error opening file for writing…
If you receive the above error when launching Firefox on a Windows system, you may be required by Firefox to log in as an administrator. You can either reboot the computer or, if you have an administrator account, you can execute the program as an administrator.
- Find the firefox.exe program file in the Firefox application folder on your system.
- Right-click the icon.
- Select Run As….Select Run As Administrator…. Select The following user:. From the User name drop-down, select Administrator or another user that has administrator privileges. Enter the password required to log in to this account. Click .
- The Firefox application is started using the administrator Windows account. The user that was used to log in to Windows at startup is still the active one.
Firefox For Mac Os X
Other error messages
If you get another error message (e.g. Fleetwood mac rumours album playlist. 'XML Parsing Error: undefined entity Location', 'Secure Connection Failed … uses an invalid security certificate'), see Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems.
If you click the Firefox icon but no Firefox window opens and no error message is shown, a simple first step is to restart your computer and then try again. If Firefox still does not start, see the following sections.
Firefox will not start after updating
- Outdated versions of Comodo Firewall or Comodo Antivirus security software (or a leftover file after Comodo was uninstalled) can cause Firefox not to start with no error message. Update Comodo to the latest version, if you have it installed. If Comodo software is not installed, check if there's a file called IseGuard64.dll or IseGuard32.dll in your C:Windowssystem32 folder or your system drive and, if so, manually delete the file.
- If you use certain versions of ZoneAlarm or other Internet security software that includes a 'Virtual Browsing' feature, it can prevent Firefox from starting. Check virtualization settings and clear the virtual cache, if your Internet security software includes this feature, or visit the software provider's support site for more help.
- Firefox may fail to start for some Windows users after updating, if AVG or AVAST antivirus is installed. For details, see this Techdows article.
![Download Download](/uploads/1/2/6/7/126752151/259519045.png)
Firefox will not start after installing add-ons
If Firefox previously worked but stopped after you installed extensions or themes, see Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems.
![50.0.1 50.0.1](/uploads/1/2/6/7/126752151/317847326.png)
Firefox previously worked
If Firefox previously worked but suddenly doesn't start, it may be due to some corrupt data in your settings. Uninstalling and reinstalling Firefox would not fix this problem because your settings are not removed on uninstall.
To test to see if this is the problem, use the Profile Manager to create a new profile. If the problem goes away, you can then move your bookmarks and other important settings into the new profile.
Firefox will not start because of missing libraries
https://heavyyouth.weebly.com/quick-heal-total-security-2015-serial-key-generator.html. If you installed Firefox outside of your package manager, make sure that your system has the libraries listed in the system requirements.
Based on information from Browser will not start up (mozillaZine KB)
This article explains how to download and install Firefox on a Mac.
- If you are updating from a previous version of Firefox, see Update Firefox to the latest release.
Note: This article only applies to Mac. For instructions to install Firefox on Windows, see How to download and install Firefox on Windows.For instructions to install Firefox on Linux, see Install Firefox on Linux.
Make sure your Mac meets the System Requirements for Firefox. If you use an old version of OS X, see these articles for more information:
- Visit the Firefox download page in any browser (for example, Safari). It will automatically detect the platform and language on your computer and recommend the best version of Firefox for you.
- Click .
- Note: If you want to have a choice of the language for your Firefox installation, click the Download options and other languages link instead.
- Once the download has completed, the file (Firefox.dmg) may open by itself and pop open a Finder window containing the Firefox application. Drag the Firefox icon on top of the Applications folder in order to copy it there.
- Note: If you do not see this window, open the Firefox.dmg file that you downloaded.
- After dragging Firefox to the Applications folder, hold down the control key while clicking in the window and select Eject 'Firefox' from the menu.
Complete the steps above before running Firefox. Do not run Firefox directly from the Firefox.dmg file, as this can result in issues such as lost data and settings.
Tip: You can add Firefox to your dock for easy access. Just open your Applications folder and drag Firefox to the dock.
Firefox Old Versions For Mac
Firefox is now ready for use. Just click on its icon in the dock or Applications folder to start it.
Firefox 50.0.1 Download
Sonos mac os x download. When you first start up Firefox, you will be warned that you downloaded Firefox from the Internet. Because you download Firefox from the official site, click .
Firefox For Mac Ios
Maple software download, free. Upon installation, Firefox will not be your default browser, which you'll be notified about. That means that when you open a link in your mail application, an Internet shortcut, or HTML document, it will not open in Firefox. If you want Firefox to do those things, click . If you're just trying out Firefox or simply do not wish to set Firefox as your default browser, click .