Examine source code of Purity.

{
  "theme": {
    "images": {
      "theme_frame": "PurityH4Custom.jpg"
    },
    "colors": {
      "frame": "#e0d0d0",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Purity.",
  "manifest_version": 2,
  "description": "flowers, white, violet, purple, abstract, silver swirls, hearts, floral, My wallpaper to match can be found at: <a href=\"https://outgoing.prod.mozaws.net/v1/9c88cc039254d450ab3417eefae1a38193b259e0a09ae647e5d8151ed3808e83/http%3A//nature.desktopnexus.com/wallpaper/715029/\" rel=\"nofollow\">http://nature.desktopnexus.com/wallpaper/715029/</a>"
}