Fix specific errors

•  "Firefox is already running but is not responding" error - How to fix
•  Could not initialize the application's security component
•  Enable SSL to fix the Firefox cannot connect securely error message
•  Secure connection and security warning error pages in Firefox
•  Server Not Found - Troubleshoot connection problems
•  "This Connection is Untrusted" error message appears - What to do
•  Warning Unresponsive script - What it means and how to fix it
•  Why does my home page say I need to update Firefox when I have the latest version?
•  Re-enable add-ons that were disabled when updating Firefox
•  Error messages when Firefox won't start (XULRunner - Error and others)
•  Fix problems with Kaspersky, Norton, Google or other toolbars

Fix Firefox TypeError messages

Firefox will popup an error in a number of situations. Most often this is caused by a misbehaving extension.

Disable common problem extensions

Before going through complicated troubleshooting steps, try disabling these extensions:

1. Click the menu button , click Add-ons and themesExtensions and themes and select Extensions.
2. If you see Orbit downloader or 1-click YouTube downloader extensions, click the disable button next to them.
   • In the past McAfee SiteAdvisor, ZoneAlarm or PC Tools have also been problems.
3. Click Restart Firefox.

If the steps above didn't solve the problem, try these articles:

•  Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems
•  Check for new versions of your add-ons
•  How to fix the Update Failed error message when updating Firefox
•  Websites don't load - troubleshoot and fix error messages
•  Disable or remove Add-ons