Examine source code of Making Christmas Bright

{
  "name": "Making Christmas Bright",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "MakingChristmasBrightH2Custom.jpg"
    },
    "colors": {
      "frame": "rgba(60, 122, 230, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(60, 117, 232, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(60, 117, 232, 0.07)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{42845f62-3ca5-4b67-9eb4-93a06bb9cb3d}"
    }
  }
}