Examine source code of Holiday Christmas lights

{
  "name": "Christmas lights",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "christmas.jpg"
    },
    "colors": {
      "frame": "rgba(5, 9, 18, 1)",
      "tab_background_text": "rgba(235, 200, 170, 1)",
      "toolbar": "rgba(46, 7, 7, 1)",
      "bookmark_text": "rgba(250, 212, 192, 1)",
      "toolbar_field": "rgba(79, 8, 8, 1)",
      "toolbar_field_text": "rgba(191, 42, 42, 1)",
      "tab_line": "rgba(36, 5, 5, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{12181176-7a30-4a30-8bc4-4545ad66ae9e}"
    }
  }
}