Examine source code of Spell Scale

{
  "theme": {
    "images": {
      "theme_frame": "SpellScalePersona.jpg"
    },
    "colors": {
      "frame": "#1ce0e3",
      "tab_background_text": "#1ce0e3"
    }
  },
  "version": "2.0",
  "name": "Spell Scale",
  "manifest_version": 2,
  "description": "Artwork (c) Misty Coats\n<a href=\"https://outgoing.prod.mozaws.net/v1/0f1046b941952c907d6d00b5017122d5291118a51aee529c12a2544f29272491/http%3A//sayda.deviantart.com/art/Spell-Scale-36208706\" rel=\"nofollow\">http://sayda.deviantart.com/art/Spell-Scale-36208706</a>"
}