[Enigmail] Off Topic: Where do I start learning about XPI?

[Robert J. Hansen]

Robert J. Hansen wrote:
> http://developer.mozilla.org/en/Learn_XPI_Installer_Scripting_by_Example

D'oh!  Faramir, you weren't kidding about most of the things being
deprecated.

http://developer.mozilla.org/en/Bundles

That one may be more useful to you.  At the very least, expect to get on
a first-name basis with JavaScript.  You may find it convenient to learn
Scheme first; most advanced JavaScript techniques are very, very similar
to Scheme techniques, and Scheme is a much easier language to learn.