Examine source code of Lisible

{
  "name": "Lisible",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Logo Frifox.jpeg"
    },
    "colors": {
      "frame": "rgba(23, 90, 235, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(240, 14, 14, 1)",
      "bookmark_text": "rgba(245, 240, 240, 1)",
      "toolbar_field": "rgba(0, 0, 0, 1)",
      "toolbar_field_text": "rgba(250, 250, 250, 1)"
    }
  }
}