Change secure http page content in a Firefox extension using Greasemonkey compiler

I'm building a Firefox extension that alters the page content of a few select websites and I'm using the Greasemonkey compiler to do this (http://diveintogreasemonkey.org/advanced/compiler.html).

The trouble I'm having though is with websites using secure http. Even if I list the https version of the site in my @includes, Greasemonkey still doesn't pick it up and change the scripted content.

Any ideas on h开发者_开发问答ow I can still have the same effect on https sites? Thanks.