Why have ad windows, identified as being generated by Firefox, become so frequent and intrusive?

Question

Specifically: Ad windows (saying they are generated by Firefox) have increased to the point of being way too intrusive. They have started to become unbearingly annoying for about a month, give or take a week... or so. (obviously I have no idea how long but they have become really frequent and intrusive "lately.") Example is the TV Guide page. Say it's up and running and I go over and change the time/day schedule. When I click on "Go" I won't get the schedule, the Firefox ad window is the only page that opens. When this happens frequently on this and other pages, it has become intrusive and annoying and could possibly lead to checking out other browsers.
I understand you guys and ladies are all volunteers and donate your considerable talents for the right reasons. This will always make me hesitant to change browsers. Thank you for your efforts. (but is there a way you can make the ads less in-your-face? )

Answer 1

Do a malware check with some malware scanning programs on the Windows computer.<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 /><br />
*http://www.malwarebytes.org/mbam.php - Malwarebytes' Anti-Malware
*http://www.superantispyware.com/ - SuperAntispyware
*http://www.microsoft.com/security/scanner/en-us/default.aspx - Microsoft Safety Scanner
*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