This is an open source project that one of my friends at school started.  Here is a quick description of the project.

FireBreath aims to be a cross-platform plugin architecture, targeting:

• NPAPI browsers on windows, mac, and linux:
  • Gecko/Firefox
  • Google Chrome
  • Apple Safari
• ActiveX Control hosts:
  • Microsoft Internet Explorer 6, 7, and 8

FireBreath is licensed under a dual license structure; this means you can choose which of two licenses to use it under. FireBreath can be used under the New BSD license or the GNU Lesser General Public License v2.1.

Here is his announcement and reflections on starting an open source project.