Examine source code of teste01

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Black & White",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(230, 230, 230)",
      "toolbar_text": "rgb(50, 50, 50)",
      "frame": "rgb(50, 50, 50)",
      "tab_background_text": "rgb(230, 230, 230)",
      "toolbar_field": "rgb(230, 230, 230)",
      "toolbar_field_text": "rgb(20, 20, 20)",
      "tab_line": "rgb(50, 50, 50)",
      "popup": "rgb(230, 230, 230)",
      "popup_text": "rgb(20, 20, 20)",
      "tab_loading": "rgb(50, 50, 50)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ba7188d1-65f7-4491-ba88-5ee1b334b610}"
    }
  }
}