Examine source code of Cat at Christmas

{
  "name": "Cat at Christmas",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "CatatChristmasTimeHCustom.jpg"
    },
    "colors": {
      "frame": "rgba(199, 210, 245, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(201, 211, 247, 0)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(237, 240, 250, 0.07)",
      "toolbar_field_text": "rgba(5, 5, 5, 1)",
      "tab_line": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6eb3bac7-ebbf-4fe9-9860-d8eacf75eedb}"
    }
  }
}