Examine source code of Eastern Tiger Swallowtail

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#eec134",
      "tab_background_text": "#050503"
    }
  },
  "version": "2.0",
  "name": "Eastern Tiger Swallowtail",
  "manifest_version": 2,
  "description": "Male eastern tiger swallowtail (Papilio glaucus) butterfly, a native of the eastern United States of America."
}