''locking this thread as duplicate, please continue at [https://support.mozilla.org/en-US/questions/1281053]'' In recent weeks, clicking on an Outlook email which says "click here to view it in a web browser" loads up Internet Explorer. It used to be Firefox which provided the web page. So it looks as though MS IE has infiltrated the computer. How do I clear it out? In Options, Firefox is still listed as the default browser and searching the page produces no hits for Internet Explorer as an add-on etc.