Examine source code of Firefox Plugins

{
  "theme": {
    "images": {
      "theme_frame": "other1.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "Firefox Plugins",
  "manifest_version": 2,
  "description": "Art by Tacimur : <a href=\"https://outgoing.prod.mozaws.net/v1/f5373569358a43a5ee4e5d054f4cd97aea22a3c640ae071bb1ef4059868978a0/http%3A//tacimur.deviantart.com/art/scrap-oldest-joke-evar-16706886\" rel=\"nofollow\">http://tacimur.deviantart.com/art/scrap-oldest-joke-evar-16706886</a>"
}