Examine source code of 8-Bit Christmas

{
  "name": "8-Bit Christmas",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "8-Bit Christmas.png"
    },
    "colors": {
      "frame": "rgba(146, 52, 4, 1)",
      "tab_background_text": "rgba(90, 205, 78, 1)",
      "toolbar": "rgba(90, 205, 78, 1)",
      "bookmark_text": "rgba(252, 252, 252, 1)",
      "toolbar_field": "rgba(183, 229, 235, 1)",
      "toolbar_field_text": "rgba(146, 52, 4, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{67801c0a-6a22-48fb-8d83-7f33a8daf55f}"
    }
  }
}