Examine source code of Cincinnati Bengals (NFL)

{
  "name": "Cincinnati Bengals (NFL)",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Variant=Default.svg"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(34, 34, 34, 0.7)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(34, 34, 34, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(251, 79, 20, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d21b9af1-1428-4fd0-8a4e-d2c0c4620ac6}"
    }
  }
}