Examine source code of Towncrier

{
  "theme": {
    "images": {
      "theme_frame": "TILbrowserprofile.png"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "Towncrier",
  "manifest_version": 2,
  "description": "Website persona for <a href=\"https://outgoing.prod.mozaws.net/v1/0ba57cc5e4887a951c4dea7f602b72973165f8866cb8efbb86bd22ff25879344/http%3A//www.textitloud.com\" rel=\"nofollow\">www.textitloud.com</a>"
}