Examine source code of Listen Silence

{
  "theme": {
    "images": {
      "theme_frame": "silence_header.jpg"
    },
    "colors": {
      "frame": "#faeded",
      "tab_background_text": "#f5f0f0"
    }
  },
  "version": "2.0",
  "name": "Listen Silence",
  "manifest_version": 2,
  "description": "Have you even listen to the silence..\nListen the silence, listen your inner voice"
}