Examine source code of dark knight 123

{
  "theme": {
    "images": {
      "theme_frame": "FA.jpg"
    },
    "colors": {
      "frame": "#f7f2f2",
      "tab_background_text": "#fa0303"
    }
  },
  "version": "2.0",
  "name": "dark knight 123",
  "manifest_version": 2,
  "description": "astig yo"
}