Examine source code of regretsy in space

{
  "theme": {
    "images": {
      "theme_frame": "regretsy_header2.jpg"
    },
    "colors": {
      "frame": "#990000",
      "tab_background_text": "#ffffcc"
    }
  },
  "version": "2.0",
  "name": "regretsy in space",
  "manifest_version": 2,
  "description": "a tribute to <a href=\"https://outgoing.prod.mozaws.net/v1/4977354cf3cd026d44f4c36ec4c41bbd5f76f715c883da5c3da8b6e04a37ffa6/http%3A//regretsy.com\" rel=\"nofollow\">regretsy.com</a>"
}