Examine source code of Save It Easy

{
  "theme": {
    "images": {
      "theme_frame": "SIEPersonaHeader.jpg"
    },
    "colors": {
      "frame": "#004514",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Save It Easy",
  "manifest_version": 2,
  "description": "Save It Easy\nThe ultimate solution to save cost, energy and the environment on your fluorescent tube lamps"
}