Examine source code of Kill La Kill Ryuko Matoi

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#414141",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Kill La Kill Ryuko Matoi",
  "manifest_version": 2,
  "description": "Ryuko Matoi from Kill La Kill on a dark background with criss-crossing red lines"
}