Examine source code of Ethereal Cosmos

{
  "name": "Ethereal Cosmos",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "Cosmos static.gif"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{eefe1dee-772d-4c4f-bc89-1758c0748a1a}"
    }
  }
}