Examine source code of Fresh Paint

{
  "theme": {
    "images": {
      "theme_frame": "FreshPaintHCustom.jpg"
    },
    "colors": {
      "frame": "#ffff99",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Fresh Paint",
  "manifest_version": 2,
  "description": "abstract, growing, leaves, paint, painted, plant red, spring, summer, art, My wallpaper to match is at: <a href=\"https://outgoing.prod.mozaws.net/v1/6253aec8d0e179c6f894e1bcabdc0a5596675cff127ee4cdb4f17def6accd3e3/http%3A//nature.desktopnexus.com/wallpaper/962806/\" rel=\"nofollow\">http://nature.desktopnexus.com/wallpaper/962806/</a>"
}