Examine source code of the Purp Firefox

{
  "theme": {
    "images": {
      "theme_frame": "thepurpfirefox.png"
    },
    "colors": {
      "frame": "#cfcfcf",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "the Purp Firefox",
  "manifest_version": 2,
  "description": "Purple and black checkers with firefox logo in left corner."
}