Welcome to WebmasterWorld kembreg :)
When I tested the page, the accents didn't display correctly in IE8 either. The explanation is simple - the text is not actually encoded in UTF-8, despite the charset declaration. In fact, the page is currently encoded in ISO-8859-1. (Or ISO-8859-15 or windows-1252, which are functional equivalents of ISO-8859-1 apart from some minor differences)
For a temporary fix for you only, go to the View menu in Firefox and choose ISO-8859-1 from the list, and the accents will display correctly.
The permanent fix is either to declare the current charset instead of UTF-8, or to convert the text to UTF-8 encoding.