Hi, you have 'Foxstart Default Settings' as one of your extensions. This seems to be a browser hijacker which could well be causing your problem.
You can try these free programs to scan for malware, which work with your existing antivirus software:
Microsoft Security Essentials is a good permanent antivirus for Windows 7/Vista/XP if you don't already have one. Windows 8 has antivirus built-in already.
Further information can be found in the Troubleshoot Firefox issues caused by malware article.
Note that not all removal programs will detect all malware, so you may need to run several or all of them.
After removal you may need to reset your home page and search, which you can do by running the add-on SearchReset.
If that isn't the cause, you can try disabling graphics hardware acceleration. Since this feature was added to Firefox, it has gradually improved, but there still are a few glitches.
You will need to restart Firefox for this to take effect so save all work first (e.g., mail you are composing, online documents you're editing, etc.).
Then perform these steps:
- Click the menu button
and select Options on Windows or Preferences on Mac or Linux.
- Select the Advanced panel and then the General tab.
- Uncheck Use hardware acceleration when available.
- Restart Firefox and see if the problems persist.
Did this fix your problems? Please report back to us!
If the problem is resolved, you should check for updates for your graphics driver by following the steps mentioned in these Knowledge base articles:
Thank you.
Hi, you have 'Foxstart Default Settings' as one of your extensions. This seems to be a browser hijacker which could well be causing your problem.
You can try these free programs to scan for malware, which work with your existing antivirus software:
* [http://www.microsoft.com/security/scanner/default.aspx Microsoft Safety Scanner]
* [http://www.malwarebytes.org/products/malwarebytes_free/ MalwareBytes' Anti-Malware]
* [http://support.kaspersky.com/viruses/disinfection/5350 Anti-Rootkit Utility - TDSSKiller]
* [http://general-changelog-team.fr/en/downloads/viewdownload/20-outils-de-xplode/2-adwcleaner AdwCleaner] (for more info, see this [http://www.bleepingcomputer.com/download/adwcleaner/ alternate AdwCleaner download page])
* [http://www.surfright.nl/en/hitmanpro/ Hitman Pro]
* [http://www.eset.com/us/online-scanner/ ESET Online Scanner]
[http://windows.microsoft.com/MSE Microsoft Security Essentials] is a good permanent antivirus for Windows 7/Vista/XP if you don't already have one. Windows 8 has antivirus [http://www.microsoft.com/security/pc-security/windows8.aspx#antivirus built-in] already.
Further information can be found in the [[Troubleshoot Firefox issues caused by malware]] article.
'''Note that not all removal programs will detect all malware, so you may need to run several or all of them.'''
After removal you may need to reset your home page and search, which you can do by running the add-on [https://addons.mozilla.org/en-US/firefox/addon/searchreset/ SearchReset.]
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If that isn't the cause, you can try disabling graphics hardware acceleration. Since this feature was added to Firefox, it has gradually improved, but there still are a few glitches.
You will need to restart Firefox for this to take effect so save all work first (e.g., mail you are composing, online documents you're editing, etc.).
Then perform these steps:
#Click the menu button [[Image:New Fx Menu]] and select ''Options'' on Windows or ''Preferences'' on Mac or Linux.
#Select the ''Advanced'' panel and then the ''General'' tab.
#Uncheck '''Use hardware acceleration when available'''.
#Restart Firefox and see if the problems persist.
Did this fix your problems? Please report back to us!
If the problem is resolved, you should check for updates for your graphics driver by following the steps mentioned in these Knowledge base articles:
* [[Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems#w_turn-off-hardware-acceleration]]
* [[Upgrade your graphics drivers to use hardware acceleration and WebGL]]
Thank you.
