Examine source code of prl451

{
  "name": "677",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "halloween-vampires-roronoa-zoro-monkey-d-luffy-sanji-anime-1920x1080.jpg"
    },
    "colors": {
      "frame": "rgba(176, 0, 158, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(0, 0, 0, 1)",
      "bookmark_text": "rgba(144, 0, 184, 1)",
      "toolbar_field": "rgba(176, 2, 75, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(158, 2, 111, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{521a407c-2c57-45a1-8411-8585eae53cd9}"
    }
  }
}