Examine source code of Arcade Space Shooter

{
  "name": "Arcade Space Shooter",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Arcade Space Shooter.png"
    },
    "colors": {
      "frame": "rgba(27, 5, 52, 1)",
      "tab_background_text": "rgba(194, 46, 199, 1)",
      "toolbar": "rgba(30, 5, 54, 0)",
      "bookmark_text": "rgba(194, 46, 199, 1)",
      "toolbar_field": "rgba(30, 5, 54, 0)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(1, 163, 206, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{900fb9b5-3ee6-40cf-b484-361e1c6d39e6}"
    }
  }
}