Examine source code of Christmas Birdies

{
  "name": "Christmas Birdies",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(235, 235, 232, 1)",
      "tab_background_text": "#000000",
      "toolbar": "rgba(237, 237, 234, 0.02)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(232, 232, 232, 0.02)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(186, 7, 7, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6d5bfc26-e154-485c-933b-e8bd35071df9}"
    }
  }
}