Examine source code of Baltimore Ravens (NFL)

{
  "name": "Baltimore Ravens (NFL)",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Variant=Default.svg"
    },
    "colors": {
      "frame": "rgba(36, 19, 95, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(19, 6, 65, 0.7)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(19, 6, 65, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(154, 118, 7, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{02ec6d9e-82a5-477c-b4b3-8a1086d786a8}"
    }
  }
}