Examine source code of Comet hitting the earth

{
  "name": "Comet hitting the earth",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Comet hiiting the earth.jpg"
    },
    "colors": {
      "frame": "rgba(18, 68, 184, 1)",
      "tab_background_text": "rgba(26, 116, 143, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{153d32eb-dcd5-4a9c-b5e2-61a4a3049f46}"
    }
  }
}