Examine source code of Twitch Pause

{
  "manifest_version": 2,
  "name": "Twitch Pause",
  "version": "1.51",
  "description": "Twitch pause extension for Mozilla",
  "icons": {
    "48": "icons/icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.twitch.tv/*"
      ],
      "js": [
        "script.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{36194883-46ca-4f68-ae13-a1c517ef8fbf}"
    }
  }
}