Examine source code of SpeakGeek

{
  "theme": {
    "images": {
      "theme_frame": "sgheader.jpg"
    },
    "colors": {
      "frame": "#bfbfbf",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "SpeakGeek",
  "manifest_version": 2,
  "description": "<a href=\"https://outgoing.prod.mozaws.net/v1/74ac4e4a56562347a061e68f50084ffa5f950aa6cfb6798048a3a348c1cb9fa4/http%3A//speekgeek.net\" rel=\"nofollow\">speekgeek.net</a> inspired design."
}