Examine source code of Teuf Livestream

{
  "description": "Show Teuf DLive Stream on your Twitch followings list",
  "manifest_version": 2,
  "name": "Teuf Livestream",
  "version": "1.1",
  "homepage_url": "https://github.com/mdn/webextensions-examples/tree/master/borderify",
  "icons": {
    "48": "icons/teufExt-48.png",
    "96": "icons/teufExt-96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.twitch.tv/*"
      ],
      "js": [
        "dlive.js"
      ]
    }
  ],
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "https://graphigo.prd.dlive.tv/"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{735bf5c9-b27a-4114-b4c6-59770b7fc2bd}"
    }
  }
}