Every time I turn on Firefox, the plasmoo.com always comes out as my home page, which is I don't want it. I have set other page in the Tool's option bar to set my home page to yahoo, for example. Then, click ok. It seems ok for the first few windows from the File button of new window selection. However, when I turn off all the windows and restart to turn on Firefox again, the unlikely homepage of plasmoo.com is still haunting on my homepage. Btw, I have drag the icon of yahoo to the Home button and click yes already, it seems ok but also doesn't succeed eventually. My question is how to delete to such annoying homepage which is unlikely presetted from my preference? Is it virus? Why do it always hack on my setted homepage? Please help!!!