Examine source code of Cambrian

{
  "name": "Cambrian",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "5972_mcn30-cambrian-sea.jpg"
    },
    "colors": {
      "frame": "rgba(58, 84, 145, 1)",
      "tab_background_text": "rgba(214, 234, 235, 1)",
      "toolbar": "rgba(34, 46, 42, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{deb0f4ca-0264-49fd-bd92-dfb3745d05eb}"
    }
  }
}