The Mozilla Firefox Start Page was set as my default web access site. Two weeks ago, MP3Tube (powered by Yahoo) suddenly became the default page, and inserted its own toolbar. I can manually delete the toolbar each time the web page is accessed, but it always reappears. I can't find a way to delete this irritating toolbar once and for all. I have restored Mozilla Firefox as the default start page, but the MP3Tube toolbar is still there.