Examine source code of Webflix

{
  "manifest_version": 2,
  "name": "Webflix",
  "version": "1.5.6resigned1",
  "description": "The Way It's Meant to be Played.",
  "icons": {
    "48": "icon.png"
  },
  "browser_action": {
    "default_icon": {
      "48": "icon.png"
    },
    "default_title": "Webflix"
  },
  "permissions": [
    "<all_urls>",
    "tabs",
    "storage",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "webflix.js"
    ]
  },
  "applications": {
    "gecko": {
      "id": "f.krutsch@gmx.de"
    }
  },
  "commands": {
    "toggle": {
      "suggested_key": {
        "default": "F11"
      }
    }
  }
}