Examine source code of Cogito Designs

{
  "theme": {
    "images": {
      "theme_frame": "firefoxPersonaHeader.jpg"
    },
    "colors": {
      "frame": "#999999",
      "tab_background_text": "#333333"
    }
  },
  "version": "2.0",
  "name": "Cogito Designs",
  "manifest_version": 2,
  "description": "clean, simple, design. based on the design of the <a href=\"https://outgoing.prod.mozaws.net/v1/410eb7f784381e7b6b175389b309966f88891302194ec26bd08a0eee02deb51b/http%3A//cogitodesigns.com\" rel=\"nofollow\">cogitodesigns.com</a> aesthetic."
}