Examine source code of Angels Cat

{
  "name": "Angels Cat",
  "manifest_version": 2,
  "version": "5.0",
  "theme": {
    "images": {
      "theme_frame": "AngelCatHCustom.jpg"
    },
    "colors": {
      "frame": "rgba(71, 80, 158, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(69, 78, 158, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(51, 56, 102, 0.03)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{02b4b137-1be8-4f4d-88bd-d3d742eda20e}"
    }
  }
}