Examine source code of Miku Hatsune Append

{
  "theme": {
    "images": {
      "theme_frame": "miku-hatsune.jpg"
    },
    "colors": {
      "frame": "#0fe8f7",
      "tab_background_text": "#0fe8f7"
    }
  },
  "version": "2.0",
  "name": "Miku Hatsune Append",
  "manifest_version": 2,
  "description": "its a pic of miku hatsune i got i thought might as well make a persona"
}