I've loaded Yahoo!Messenger onto my computer, which installs what's needed to put Yahoo Mail nto the list of available e-mail packages. Then changed things to where 'mailto:' links go to Yahoo!Mail. Click a 'mailto:' link in Firefox, and one in Chrome (I'm using the Comodo Dragon variant). Firefox sends the entire line (including the mailto tag) to the "To" field of Yahoo mail. Comodo Dragon properly puts the e-mail address in the To field and the subject in the Subject field of Yahoo!Mail. Thank you for your interest in this matter.