The text on my website displays the wrong font when viewed in Firefox on Windows 7 on a new laptop. It displays fine in Firefox on Windows XP on an older laptop, and also in IE and Google Chrome on Windows 7 on the new laptop. The fonts concerned are Arial Narrow and Franklin Gothic Medium - they show in a serif font - something like Times New Roman or similar. I have checked that Arial Narrow and Franklin Gothic Medium are available on the new laptop - they are. The website was built using MS Expression Web 2, and when webpages are opened in that programme they display the correct font. Any ideas please to correct this error?