Examine source code of Deep Blue

{
  "name": "Deep Blue",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "0570e4c9efe9324cc9aac5d3c2ba45b8.jpeg"
    },
    "colors": {
      "frame": "rgba(6, 40, 41, 1)",
      "tab_background_text": "rgba(4, 16, 33, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6069da55-4de0-4f85-8242-f42483e8deb4}"
    }
  }
}