Examine source code of HelloKittyBFF

{
  "theme": {
    "images": {
      "theme_frame": "personaheader.jpg"
    },
    "colors": {
      "frame": "#f0e62d",
      "tab_background_text": "#827979"
    }
  },
  "version": "2.0",
  "name": "HelloKittyBFF",
  "manifest_version": 2,
  "description": "And if they ask who you are, I'll them you are a star. That you are my best friend, Until the very end.\n(forgive the spelling error please...Paint.net doesn't come with spell-check)"
}