When I open Firefox a second Firefox window opens with http://www.weeklyhealthnewscanada.com/latest/articles/breakthroughdiet/vc/ca/index.php
in it. This is a form of spam since I do not want this site to open on my computer and I have not subscribed to it.
Every time Firefox opened
== In the last week or so
You most likely have two different pages set as your home page. You can remove this second page from your list of home pages - see the instructions at How to set the home page
Do a malware check with a few malware scan programs.
You need to use all programs because each detects different malware.
http://www.malwarebytes.org/mbam.php - Malwarebytes' Anti-Malware
http://www.superantispyware.com/ - SuperAntispyware
http://www.safer-networking.org/en/index.html - Spybot Search & Destroy
http://www.lavasoft.com/products/ad_aware_free.php - Ad-Aware Free
http://www.microsoft.com/windows/products/winfamily/defender/default.mspx - Windows Defender: Home Page
See also "Spyware on Windows": http://kb.mozillazine.org/Popups_not_blocked
No I do not have two home pages. The page that pops up in the second browser is a health page, I would never set a page like this as a home page.
An interesting thought though, thank you
Same annoying problem. This is some sort of pop-up ad. Probably need to clear cache and cookies. Will do Malware search.