Examine source code of Librezale

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#707070",
      "tab_background_text": "#422100"
    }
  },
  "version": "2.0",
  "name": "Librezale",
  "manifest_version": 2,
  "description": "Librezale website\n<a href=\"https://outgoing.prod.mozaws.net/v1/826c601703c5cecb89fcdd964c7302d9c867483447050b36d267d381042c25dc/http%3A//www.librezale.org\" rel=\"nofollow\">http://www.librezale.org</a>"
}