Examine source code of Katana animated

{
  "theme": {
    "images": {
      "theme_frame": "kardkeszites2_468x60.apng"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#e3e3e3"
    }
  },
  "version": "2.0",
  "name": "Katana animated",
  "manifest_version": 2
}