Hi, please try an ad-blocker add-on like [https://adblockplus.org/en/firefox Adblock Plus.] ''If your question is resolved by this or another answer, please take a minute to let us know. Thank you.''

Thank you! It's working well so far.

The System Detail list shows that you run an older Firefox 37 version that is no longer supported with security updates. *It is important to update Firefox and add-ons to the latest versions to get all security fixes. Please update to the current Firefox 42.0 release. *Help > About Firefox *https://support.mozilla.org/kb/update-firefox-latest-version ----- Do a malware check with several malware scanning programs on the Windows computer. *https://support.mozilla.org/kb/troubleshoot-firefox-issues-caused-malware Please scan with all programs because each program detects different malware. All these programs have free versions. Make sure that you update each program to get the latest version of their databases before doing a scan. *Malwarebytes' Anti-Malware:<br>http://www.malwarebytes.org/mbam.php *AdwCleaner:<br>http://www.bleepingcomputer.com/download/adwcleaner/<br>http://www.softpedia.com/get/Antivirus/Removal-Tools/AdwCleaner.shtml *SuperAntispyware:<br>http://www.superantispyware.com/ *Microsoft Safety Scanner:<br>http://www.microsoft.com/security/scanner/en-us/default.aspx *Windows Defender:<br>http://windows.microsoft.com/en-us/windows/using-defender *Spybot Search & Destroy:<br>http://www.safer-networking.org/en/index.html *Kasperky Free Security Scan:<br>http://www.kaspersky.com/security-scan You can also do a check for a rootkit infection with TDSSKiller. *Anti-rootkit utility TDSSKiller:<br>http://support.kaspersky.com/5350?el=88446 See also: *"Spyware on Windows": http://kb.mozillazine.org/Popups_not_blocked

I upgraded to Firefox 42.0. Thank you!