hi, this a spammy ad - please never download or install anything just because a popup shows up while you browse around... [[Troubleshoot Firefox issues caused by malware]]

Its possible that you downloaded software from a WebStore that uses the Secure Download Manager. It can come under different urls as another example is http://firefox-17102.avstats.com/ Mozilla does not use this SDM for any of their products including the desktop Firefox web browser from www.mozilla.org/firefox/all/ Depending on the SDM software it can install a number of things on Windows. examples http://www.shouldiremoveit.com/Secure-Download-Manager-13263-program.aspx http://www.shouldiremoveit.com/Secure-Download-Manager-9432-program.aspx