Examine source code of Elephantine

{
  "name": "Elephantine",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "Elephantine.png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(54, 32, 15, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f4266174-d811-43f1-a3c4-f1a1077301d2}"
    }
  }
}