Examine source code of Twitch Tracker

{
  "name": "Twitch Tracker",
  "version": "1.0.1",
  "manifest_version": 3,
  "description": "Easily get notified when a stream goes live. An extension by www.SirMrE.com.",
  "homepage_url": "https://www.sirmre.com",
  "browser_specific_settings": {
    "gecko": {
      "id": "mark.eliasen@pm.me"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "default_locale": "en",
  "background": {
    "scripts": [
      "src/bg/background.js"
    ],
    "type": "module"
  },
  "options_ui": {
    "page": "src/options/index.html",
    "browser_style": false
  },
  "action": {
    "default_icon": "icons/icon19.png",
    "default_title": "Twitch Tracker",
    "default_popup": "src/browser_action/browser_action.html"
  },
  "permissions": [
    "storage",
    "notifications",
    "identity"
  ],
  "host_permissions": [
    "https://*.twitch.tv/*",
    "https://static-cdn.jtvnw.net/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://www.twitch.tv/*"
      ],
      "css": [
        "src/inject/inject.css"
      ],
      "js": [
        "src/inject/inject.js"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "icons/icon128.png",
        "icons/icon128-check.png"
      ],
      "matches": [
        "https://twitch.tv/*",
        "https://www.twitch.tv/*"
      ]
    }
  ]
}