hgmo is a good starting place, but there is lots of code in other places that is either incorporated into a Firefox release or directly supports it. https://wi

hgmo is a good starting place, but there is lots of code in other places that is either incorporated into a Firefox release or directly supports it. https://wiki.mozilla.org/GitHub#Is_.22mozilla.22_the_only_github_.22organization.22_related_to_Mozilla.3F https://wiki.mozilla.org/GitHub#Is_.22mozilla.22_the_only_gi... (Disclosure: I work for Mozilla)