Hello,

Sometimes a problem with Firefox may be a result of malware installed on your computer that you may not be aware of. Check your add-ons for any suspicious extensions:

• Tools (or ) > Add-ons > Extensions
• Thank you for using the Troubleshooter - the "Click Caption" extension seems quite suspicious
  • http://malwaretips.com/blogs/ads-by-click-caption-removal/

Check your list of install programs in Windows - Control Panel > Programs and Features. Usually malware comes bundled with other applications, so if you sort by date and see several applications installed at the same day, it may be easier to find suspicious applications that way.

• Remove ClickCaption if you see it here

You can try these free programs to scan for malware, which work with your existing antivirus software:

• MalwareBytes' Anti-Malware
• AdwCleaner (for more info, see this alternate AdwCleaner download page)
• Microsoft Safety Scanner
• Anti-Rootkit Utility - TDSSKiller
• Hitman Pro
• ESET Online Scanner

Further information can be found in the Troubleshoot Firefox issues caused by malware article. Its always a good idea to have several different scanners since each use different methods of finding malware.

Did this fix your problems? If not, try posting in a forum specializing in malware removal:

• Bleeping Computer - http://www.bleepingcomputer.com/forums
• Spyware Warrior Forums - http://www.spywarewarrior.com/index.php
• SWI Forums - http://www.spywareinfoforum.com/

Please report back to us!

Your System Details list shows that you have a user.js file in the profile folder to initialize prefs each time Firefox starts.

The user.js file is only present if you or other software has created this file and normally it wouldn't be there. You can check its content with a plain text editor (right-click: Open with) if you didn't create this file yourself.

The user.js file is read each time Firefox is started and initializes preferences to the value specified in this file, so preferences set via user.js can only be changed temporarily for the current session.

You can delete the user.js file and possibly numbered prefs-##.js files and rename (or delete) the prefs.js file to reset all prefs to the default value including prefs set via user.js and prefs that are no longer supported in the current Firefox release.

• http://kb.mozillazine.org/Preferences_not_saved
• http://kb.mozillazine.org/Resetting_preferences

You can use this button to go to the currently used Firefox profile folder:

• Help > Troubleshooting Information > Profile Directory: Show Folder (Linux: Open Directory; Mac: Show in Finder)

Windows hides some file extensions by default. Among them are .html and .ini and .js and .txt, so you may only see file name without file extension. You can see the real file type (file extension) in the properties of the file via the right-click context menu in Windows Explorer.

Thanks for your help guys. Click Caption was the problem & I'm pleased to say my anti virus found it and sorted it.