You are running an outdated version of Firefox.

Please use Help > About Firefox to trigger an update. And then see if that problem is corrected, or not.

Do a scan for malware. It might be some kind of hijack attempt.

• SuperAntispyware - http://www.superantispyware.com/
• AdwCleaner - http://www.bleepingcomputer.com/download/adwcleaner/
• Malwarebytes' Anti-Malware - https://www.malwarebytes.org/
• Spybot Search & Destroy - http://www.safer-networking.org/en/index.html
• Kasperky Free Security Scan - http://www.kaspersky.com/security-scan
• Windows Defender - http://windows.microsoft.com/en-us/windows/using-defender

If these don't find it or can't clear it, post in one of these forums for specialized malware removal help:

• http://www.spywarewarrior.com/index.php
• http://www.spywareinfoforum.com/
• http://bleepingcomputer.com/
• http://www.thespykiller.co.uk/index.php?board=3.0
• http://forums.whatthetech.com/index.php?showforum=27ßß

You can also do a check for a rootkit infection with TDSSKiller.

   Anti-rootkit utility TDSSKiller:

• http://support.kaspersky.com/5350?el=88446

Ggwg2015tt said

I do not have Chrome on my laptop, which has Windows Vista. Yet, I continue to get a Firefox ad telling me that Chrome is not protected. How do I stop the firefox Chrome ad?

Is this on a Google.com site as Google tends to have a mention to get people to use the Google Chrome web browser on a corner.

The Firefox web browser and Google Chrome web browser are completely separate web browsers.

Maybe give a link or url where you see this or add a screenshot to your reply on what you see?

Can you attach a screenshot?

• http://en.wikipedia.org/wiki/Screenshot
• https://support.mozilla.org/kb/how-do-i-create-screenshot-my-problem

• Use a compressed image type like PNG or JPG to save the screenshot
• Make sure that you do not exceed the maximum size of 1 MB