Examine source code of Cursed Seal One

{
  "theme": {
    "images": {
      "theme_frame": "CursedSealFirefoxpersona.jpg"
    },
    "colors": {
      "frame": "#050608",
      "tab_background_text": "#050608"
    }
  },
  "version": "2.0",
  "name": "Cursed Seal One",
  "manifest_version": 2,
  "description": "Sasuke's Cursed Seal"
}