Examine source code of Libbie

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#106802",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Libbie",
  "manifest_version": 2,
  "description": "A simple theme based upon <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/07ddf5161fadbf59d1d94012a874f71e54000c26e3957727d591c70eca2f61d0/https%3A//twitter.com/TysonTanX/status/930706820003450885\">Libbie</a><a> by </a><a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/9c728ddd3f23d0e7ba2979a6c3364afce4381d04c123ec9507c0d0243ea3078e/https%3A//twitter.com/TysonTanX\">Tyson Tan</a><a></a>"
}