Sounds like you picked up some "Bing Malware". You can install this add-on which will reset your newtab page to default. https://addons.mozilla.org/en-US/firefox/addon/searchreset/

But if the newtab page goes back to Bing after re-opening Firefox or starting up your PC, you'll need to find that malware and get rid of it.

Sometimes a problem with Firefox may be a result of malware installed on your computer, that you may not be aware of.

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

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

Microsoft Security Essentials is a good permanent antivirus for Windows 7/Vista/XP if you don't already have one.

Further information can be found in the Troubleshoot Firefox issues caused by malware article.

Did this fix your problems? Please report back to us!

• browser.newtab.url: http://www.bing.com/?pc=COSP&ptag=D112014-A02667CCEAD2B49EEB1F&form=CONMHP&conlogo=CT3330960

You appear to have an infection with a community toolbar.

You can use the SearchReset extension to reset some preferences to the default values.

• https://addons.mozilla.org/firefox/addon/searchreset/

Note that the SearchReset extension only runs once and then uninstalls automatically, so it won't show on the "Firefox > Add-ons" page (about:addons).

If you do not keep changes after a restart or otherwise have problems with preferences, see:

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

I have a similar problem.

I get a AVG Secure Search page instead of the thumbnail page now when I load a new tab. How do I get the thumbnails back? I don't have an gear icon on the page to switch it back. This happen after I did a reset of Firefox so that MapQuest would work again which it now does.

What is interesting is that I get thumbnails if I open a second Firefox window and then click on a new tap page.

I've install the searchreset addon with no luck. I've run Microsoft Safety Scanner and no problems have been identified.

Hi sageventure

Did you check the browser.newtab.url pref on the about:config page?

See this article about the New Tab page (about:newtab):

• https://support.mozilla.org/kb/new-tab-page-show-hide-and-customize-top-sites

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.

• Switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance
• Do NOT click the Reset button on the Safe Mode start window

• https://support.mozilla.org/kb/Safe+Mode
• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

If you do not keep changes after a restart or otherwise have problems with preferences, see:

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

Thanks. After reading through all your info, I was able to resolve the problem by uninstalling firefox and reloading firefox again.