Examine source code of Batman Beyond

{
  "theme": {
    "images": {
      "theme_frame": "BrowserHeaderBatmanBeyond.jpg"
    },
    "colors": {
      "frame": "#fcfcfc",
      "tab_background_text": "#fcfcfc"
    }
  },
  "version": "2.0",
  "name": "Batman Beyond",
  "manifest_version": 2,
  "description": "I created this persona using a gradiant of grey and black, Batman beyond symbol, and some letting I found that looked cool"
}