Examine source code of Twitch Ad Forwarder

{
  "manifest_version": 2,
  "name": "Adforwarder",
  "version": "0.3.9.131",
  "description": "Twitch ad data forwarder/timer for mod view",
  "icons": {
    "16": "icons/icon_16.png",
    "32": "icons/icon_32.png",
    "48": "icons/icon_48.png",
    "128": "icons/icon_128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/icon_32.png",
    "default_title": "Adforwarder",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "https://*.amazonaws.com/*",
    "identity",
    "storage",
    "tabs"
  ],
  "web_accessible_resources": [
    "content.html",
    "contentScript.css"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://dashboard.twitch.tv/popout/u/*/stream-manager/streamer-ads-manager-panel",
        "https://www.twitch.tv/moderator/*"
      ],
      "run_at": "document_idle",
      "js": [
        "contentScript.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{607df534-f606-42f5-9468-ddb1b0b17cdf}"
    }
  }
}