I had this too - lots of random words underlined and leading to advertising links. Turns out the most recent update I did of Mozilla had this attached to it - but it was easily located in my Programs (as Yontuu) and is gone now....I think!!
To celebrate the release of Monster High: Haunted, we are giving one lucky winner an online writing course through Bernard Cohen?s The Writing Workshop, to become a journalist just like ghoul Spectra Vondergeist. The prize includes a Monster High: Haunted DVD and Haunted Rochelle Doll.