manifest.json

{
    "manifest_version": 2,

    "name": "Signal Private Messenger",
    "short_name": "Signal",
    "description": "__MSG_installTagline__",
    "version": "0.41.3",
    "offline_enabled": false,
    "minimum_chrome_version": "37",
    "default_locale": "en",

    "permissions": [
      "unlimitedStorage",
      "notifications",
      {"fileSystem": ["write"]},
      "alarms",
      "fullscreen",
      "audioCapture"
    ],

    "icons": {
      "16": "images/icon_16.png",
      "32": "images/icon_32.png",
      "48": "images/icon_48.png",
      "128": "images/icon_128.png",
      "256": "images/icon_256.png"
    },

    "app": {
      "background": {
          "page": "background.html"
      }
    },

    "commands": {
      "show_signal": {
        "description": "Show the Signal inbox."
      }
    }

}