Examine source code of Netflix Playback Enhancer

{
  "manifest_version": 2,
  "name": "Netflix Playback Enhancer",
  "version": "1.0",
  "description": "Manually set the highest bitrate for better video quality on Netflix.",
  "icons": {
    "48": "icon.png"
  },
  "permissions": [
    "activeTab"
  ],
  "host_permissions": [
    "*://*.netflix.com/*"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{19504cfe-3a18-4297-a00c-19cb27e3349e}"
    }
  }
}