Examine source code of Tom Sawyer

{
  "name": "Tom Sawyer",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "tom 3.jpg"
    },
    "colors": {
      "toolbar": "rgba(15, 2, 2, 1)",
      "toolbar_field": "rgba(201, 24, 24, 0.83)",
      "frame": "rgba(1, 2, 5, 0.83)",
      "tab_background_text": "rgba(145, 32, 113, 0.92)",
      "bookmark_text": "rgba(15, 3, 3, 1)"
    }
  }
}