Examine source code of MineCraft.tnt

{
  "name": "ddd",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "ddd.png"
    },
    "colors": {
      "frame": "rgba(189, 66, 62, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(0, 0, 0, 0.43)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(176, 0, 0, 0.67)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(56, 25, 25, 0.24)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2e20f371-c56f-4a13-8763-f3ce5b2d0381}"
    }
  }
}