Examine source code of Robot-Android

{
  "theme": {
    "images": {
      "theme_frame": "theme_toolbar.png"
    },
    "colors": {
      "frame": "#4f4f4f",
      "tab_background_text": "#00851d"
    }
  },
  "version": "2.0",
  "name": "Robot-Android",
  "manifest_version": 2,
  "description": "I took some of the images form the \"Robot\" theme for Google Chrome (<a href=\"https://outgoing.prod.mozaws.net/v1/a728b61fe3157fc71505ff6358d82c9197344c2d118b14a69a43309a3557a687/https%3A//chrome.google.com/extensions/detail/oeljdmeofcikjblcoehpmdnooimalbmj\" rel=\"nofollow\">https://chrome.google.com/extensions/detail/oeljdmeofcikjblcoehpmdnooimalbmj</a>) and made theme into a Firefox persona."
}