Examine source code of Bear Light

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#0c170e",
      "tab_background_text": "#e8ffec"
    }
  },
  "version": "2.0",
  "name": "Bear Light",
  "manifest_version": 2,
  "description": "Stock credit: <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/eaf6b02be311cb5f8afc39be8942875a1574ca7b51d1189c415b39ac675d6836/https%3A//pixabay.com/en/users/darkmoon1968-1664300/\">darkmoon1968\n</a>, <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/c5f4969e26651bec05d962951eb3358dc9c8237841b2759885b720b2f63cef08/https%3A//pixabay.com/en/users/Pexels-2286921/\">Pexels\n</a>"
}