Examine source code of Loup dessin

{
  "name": "theme louve ",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "theme louve .png"
    },
    "colors": {
      "frame": "rgba(212, 212, 212, 1)",
      "tab_background_text": "rgba(201, 201, 201, 1)",
      "toolbar": "rgba(255, 255, 255, 0)",
      "bookmark_text": "rgba(189, 189, 189, 1)",
      "toolbar_field": "rgba(255, 255, 255, 0.18)",
      "toolbar_field_text": "rgba(199, 199, 199, 1)"
    }
  }
}