Examine source code of Endless by Hasara

{
  "theme": {
    "images": {
      "theme_frame": "HasaraPersonaHeader.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#0a0a0a"
    }
  },
  "version": "2.0",
  "name": "Endless by Hasara",
  "manifest_version": 2,
  "description": "Hasara's \"Endless\"\nMore of her art can be found at The Bored Club.\n<a href=\"https://outgoing.prod.mozaws.net/v1/bdb0fd734b13247c2d9cdb1be8a40cd821c7074e3f8876a0e406242b592919a8/http%3A//boredclub.net\" rel=\"nofollow\">http://boredclub.net</a>"
}