Examine source code of Lhoost

{
  "name": "Lhoost",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "blue-universe-956981 - Kopie.jpg"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(255, 253, 1, 1)",
      "toolbar_field": "rgba(12, 0, 89, 1)",
      "toolbar_field_text": "rgba(255, 253, 1, 1)"
    }
  }
}