This method is only possible if the font kappa is present on everyone's hdd's font folder (ie the font is installed on their pc)
Else it is not possible so you could just add a footnote saying "For best experience please download and install the font Kappa"
Or if that page says,"Best viewed in Firefox at 1024x768" then you could add "with the font Kappa"
Obviously you have to link to that font for download, preferably in a zip archive