Examine source code of Sync

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#dfdfdf",
      "tab_background_text": "#3b3b3b"
    }
  },
  "version": "2.0",
  "name": "Sync",
  "manifest_version": 2,
  "description": "A light off white persona, to compliment firefox UI"
}