Examine source code of Charming nerd

{
  "name": "Charming nerd",
  "manifest_version": 2,
  "version": "5.0",
  "theme": {
    "images": {
      "theme_frame": "telegrambg(1).jpg"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 0)",
      "tab_background_text": "rgba(45, 181, 52, 0.61)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "bookmark_text": "rgba(30, 204, 54, 1)",
      "toolbar_field": "rgba(0, 0, 0, 0.41)",
      "toolbar_field_text": "rgba(255, 255, 255, 0.66)"
    }
  }
}