Examine source code of Points of Light

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#242424",
      "tab_background_text": "#fff8e5"
    }
  },
  "version": "2.0",
  "name": "Points of Light",
  "manifest_version": 2,
  "description": "Stock credit: <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/0b568bb048c078af2bd2bf19b5439f08c824f459fa021da01496c78d84d201d5/https%3A//pixabay.com/en/users/miezekieze-607096/\">Sa Ka\n</a>"
}