Using a plugin generated with Firebreath in a Firefox Extension?

Question

Is it possible to use a .dll made with Firebreath in a Firefox extension?

Currently, I am trying to port an extension I made for Google Chrome that uses javascript

Answer 1

For simple functionality, I also recommend js-ctypes. It is easy to use and provides good isolation (since scripts on the page cannot access the imported library).

If you really need to access an NPAPI plugin from any page, the standard approach seems to be to create an extension and modify the DOM of each page to include the plugin:

Scriptable NPAPI plugin doesn't work with Firefox