No.Any way I can force it display via htaccess?
Not necessarily. This is where MIME come into play, specifically the Content-Disposition and Content-Type headers.That is up to the client browser. You can only control your own browser settings.
Hah, if I'd seen that I'd not have bothered writing mine, it's the same idea.I have an add-on called Open PDF which opens PDF's instead of asking to save.