Hi, I created a sample mvc application and included following code in it. <script type="text/javascript">var mf_dropbox_width=480;var mf_dropbox_id="03c14698019e70dede9ff2f115564f96af8f51dfd71439b44b03631f6cd44890";</script><script type="text/javascript" src="http://www.mediafire.com/dropbox/dropbox.js"></script> <div style='clear: both;'></div> The hyperlink select files does not work. Please click on the following link I found on web and when the page opens click select files. http://prewire-pics.blogspot.com/2011/11/var-mfdropboxwidth480var_6673.html The same works well in Internet Explorer and Chrome. Is there any security setting which I need to enable?