Examine source code of ArgusFest

{
  "theme": {
    "images": {
      "theme_frame": "argusfest_firefox_header2.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "ArgusFest",
  "manifest_version": 2,
  "description": "ArgusFest uses music, film, and art to raise consciousness of human rights, social justice, media, environmental issues."
}