[Open in Internet Explorer] function does not work in Firefox 4.0 Rated 4 out of 5 stars

Since I updated to Firefox 4.0 some functions of IE View have stopped working. For example [Open in Internet Explorer] function, simply does nothing. I have to open the page in Firefox and then do [View this page in IE]. I miss that function very much, especially at my workplace.

This review is for a previous version of the add-on (1.4.5.1.1-signed.1-signed).