Examine source code of Cherry blossom gift

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#fcf9fa",
      "tab_background_text": "#f5e7eb"
    }
  },
  "version": "2.0",
  "name": "Cherry blossom gift",
  "manifest_version": 2,
  "description": "Blossoms on an old Japanese cherry tree in Washington, DC, USA. The oldest of these trees, including this one, were a gift to the United States from Japan in the early twentieth century."
}