Examine source code of Pink Cute Hello Kitty

{
  "theme": {
    "images": {
      "theme_frame": "HellokittyFirefox.JPG"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Pink Cute Hello Kitty",
  "manifest_version": 2,
  "description": "A Hello Kitty Firefox Persona, mainly made for myself, but anyone can use it."
}