Examine source code of Black Fire Dragon

{
  "name": "Black Fire Dragon",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "ed2c6b6a77fd9358fe61ec9f88a9c2b0-d6zwrzr.png"
    },
    "colors": {
      "frame": "rgb(58, 58, 58)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar": "rgba(143, 143, 143, 1)",
      "bookmark_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(0, 0, 0)"
    }
  }
}