Examine source code of Buffalo Bills (NFL)

{
  "name": "Buffalo Bills (NFL)",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Variant=Default.svg"
    },
    "colors": {
      "frame": "rgba(0, 51, 141, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(0, 27, 74, 0.7)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(0, 27, 74, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{bf921c31-1e8e-4f6e-b4de-40e0e62e23e4}"
    }
  }
}