Examine source code of Pika tree

{
  "theme": {
    "images": {
      "theme_frame": "Persona_jpg4.JPG"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#c74f51"
    }
  },
  "version": "2.0",
  "name": "Pika tree",
  "manifest_version": 2,
  "description": "Many Pikachus are sitting under trees while eating and playing with apples"
}