Examine source code of Physical Graffiti

{
  "name": "Physical Graffiti",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "abstrakt147.png"
    },
    "colors": {
      "frame": "rgba(38, 79, 21, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(0, 0, 0, 0.52)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(3, 3, 3, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(238, 255, 0, 0.54)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1f24d079-427e-46ca-af05-006f70a585b6}"
    }
  }
}