Examine source code of Happy Easter by Marte

{
  "theme": {
    "images": {
      "theme_frame": "easter2.jpg"
    },
    "colors": {
      "frame": "#c7c7c7",
      "tab_background_text": "#820404"
    }
  },
  "version": "2.0",
  "name": "Happy Easter by Marte",
  "manifest_version": 2,
  "description": "happy easter eggs yellow egg biddy biddies broiler broilers chick chicks\nchicken chickens"
}