Examine source code of Blue Edge

{
  "theme": {
    "images": {
      "theme_frame": "FirefoxPersona.png"
    },
    "colors": {
      "frame": "#d1d1d1",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Blue Edge",
  "manifest_version": 2,
  "description": "A Persona a spent only about an hour and a half on. Image made with SAI, text by Photoshop."
}