Examine source code of Jumping Fish

{
  "theme": {
    "images": {
      "theme_frame": "Persona_fish_Header.jpg"
    },
    "colors": {
      "frame": "#bce6f7",
      "tab_background_text": "#c43704"
    }
  },
  "version": "2.0",
  "name": "Jumping Fish",
  "manifest_version": 2,
  "description": "Colorful jumping fish, illustration by Cathy June"
}