Examine source code of Purple Render

{
  "name": "Purple Render",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "purple.render.i.kal.png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "bookmark_text": "rgba(51, 0, 117, 1)",
      "toolbar_field_text": "rgba(51, 0, 117, 1)",
      "tab_line": "rgba(0, 0, 0, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d519a3af-deb4-4b02-8440-3587161e34fb}"
    }
  }
}