Firefox repeatedly opens multiple windows

Question

Just over a week ago, I started having problems where Firefox would repeatedly open new windows as I was web surfing. Each new window is the same. They each have 3 (three) open tabs. The first tab has the url: http://search2.comcast.com/?cat=dnsr&con=ds&url=www.d.com. The second tab has the url: http://xn--xp~n ' ss14-boa27f6hze459aca6942lr1a/. And the thrid tab has the url: http://www.xn--}j--znas1698b.com:5/. The URLs for the tabs never change. In many cases, Firefox will open 5 or 6 windows all of them as described above.
I have uninstalled and reinstalled Firefox twice. I have run anti-virus/anti-spyware (Malwarebyte's Antimalware and Trend Micro 2010) with no malware found save for several cookies. I am at a loss and the problem is extremely annoying. Can someone please help me get this fixed?

Answer 1

Do a malware check with some malware scanning programs.<br />
You need to scan with all programs because each program detects different malware.<br />
Make sure that you update each program to get the latest version of their databases before doing a scan.<br />
* http://www.malwarebytes.org/mbam.php - Malwarebytes' Anti-Malware
* http://www.superantispyware.com/ - SuperAntispyware
* http://www.microsoft.com/windows/products/winfamily/defender/default.mspx - Windows Defender: Home Page
* http://www.safer-networking.org/en/index.html - Spybot Search & Destroy
* http://www.lavasoft.com/products/ad_aware_free.php - Ad-Aware Free
See also:
* "Spyware on Windows": http://kb.mozillazine.org/Popups_not_blocked