Examine source code of David and Goliath

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#a79ced",
      "tab_background_text": "#0c18a3"
    }
  },
  "version": "2.0",
  "name": "David and Goliath",
  "manifest_version": 2,
  "description": "David battling Goliath the giant. Inspired by the Holy Bible."
}