Examine source code of Bretagne Pornic-La Source

{
  "name": "Pornic-La Source",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "Pornic-La Source.jpg"
    },
    "colors": {
      "frame": "rgba(33, 37, 43, 1)",
      "tab_background_text": "rgba(0, 1, 8, 1)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "bookmark_text": "rgba(0, 1, 8, 1)",
      "toolbar_field": "rgba(0, 0, 0, 0.26)",
      "toolbar_field_text": "rgba(238, 237, 245, 1)"
    }
  }
}