Examine source code of Dark_W11

{
  "name": "Dark_W11",
  "manifest_version": 2,
  "version": "8.0",
  "theme": {
    "images": {
      "theme_frame": "FF_W11_23c.jpg"
    },
    "colors": {
      "frame": "rgba(230, 232, 235, 1)",
      "tab_background_text": "rgba(250, 250, 250, 0.8)",
      "toolbar": "rgba(0, 0, 0, 0.64)",
      "bookmark_text": "rgba(240, 240, 240, 1)",
      "toolbar_field": "rgba(242, 242, 242, 0.2)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(235, 50, 10, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{00480174-874c-4ce2-8bb3-9f79384abed0}"
    }
  }
}