I have FireFox set as my default browser in Set Program Access and Defaults and, as a result, in most cases anything that uses a browser uses FireFox rather than the default Internet Explorer. Except Excel - if I have URL links in cells and click on them Excel insists on launching IE. I have checked the Excel options and can't find anything to control this even though the "master" Set Program Access and Defaults option should take effect globally. Anybody know how to stop Excel doing this?