Examine source code of ttvn

{
  "name": "ttvn",
  "version": "0.4.0",
  "description": "Notifications for twitch.tv",
  "author": "Riku Salminen",
  "homepage_url": "https://rekurs.io/ttvn",
  "manifest_version": 2,
  "background": {
    "persistent": true,
    "scripts": [
      "ttvn.js",
      "background.js"
    ]
  },
  "permissions": [
    "notifications",
    "identity",
    "alarms"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "ttvn@rekurs.io"
    }
  },
  "icons": {
    "16": "icons/16.png",
    "32": "icons/32.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icons/16.png",
    "default_title": "ttvn"
  },
  "commands": {
    "_execute_browser_action": {
      "description": "Toggle popup",
      "suggested_key": {
        "default": "Alt+P"
      }
    }
  }
}