Examine source code of Cat Fishing

{
  "name": "Fishing Cat",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Fishing Cat.png"
    },
    "colors": {
      "frame": "rgba(50, 69, 84, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(52, 71, 87, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(52, 71, 87, 0)",
      "toolbar_field_text": "rgba(83, 201, 231, 1)",
      "tab_line": "rgba(255, 131, 82, 1)"
    }
  }
}