Examine source code of Castlevania

{
  "theme": {
    "images": {
      "theme_frame": "BrowserHeaderCastlevania.jpg"
    },
    "colors": {
      "frame": "#fa0808",
      "tab_background_text": "#fcfcfc"
    }
  },
  "version": "2.0",
  "name": "Castlevania",
  "manifest_version": 2,
  "description": "I created this persona using a red and black gradiant, the Castlevania logo, and the most popular characters from the series"
}