GMail access in Firefox Extension

I am creating a widget based application in which I need to create a widget for GMail. This application uses xulrunner based technology stack. Major features required in this widget are: 1. List of mails 2. Read/Delete/Mark/Reply/Compose a mail.

I have come across the Google's GData API which is available for all major Google products like Blogs,Calend开发者_运维问答ar,YouTube etc but not for GMail. Another way I found is to use unofficial GMail Mobile API here.

Does anybody have any other good way of doing this? Particularly I would really like to know about accessing GMail via IMAP/POP3.

Thanks in Advance.

Found this in under 1 minute of searching. http://code.google.com/intl/iw-IL/apis/gmail/imap/

This is the Google IMAP API site, it explains everything you need.