Examine source code of Plex Pace

{
  "manifest_version": 2,
  "name": "Plex Pace",
  "version": "1.1.0",
  "description": "",
  "homepage_url": "https://github.com/Good-Will-Coding/Plex-Pace",
  "icons": {
    "48": "icons/plex-pace-default.png"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_action": {
    "default_icon": "icons/plex-pace-default.png",
    "default_title": "Plex Pace",
    "default_popup": "popup/select_speed.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://app.plex.tv//*"
      ],
      "js": [
        "popup/select_speed.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{49decff1-434b-4837-9657-5d42560a6d93}"
    }
  }
}