Examine source code of WishlistWatcher

{
  "manifest_version": 3,
  "name": "WishlistWatcher",
  "version": "1.4.0",
  "description": "Track product prices across your favourite stores and get alerted when they drop to your target price.",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "permissions": [
    "activeTab",
    "contextMenus",
    "storage",
    "tabs"
  ],
  "host_permissions": [
    "https://wishlistwatcher.com/*"
  ],
  "homepage_url": "https://wishlistwatcher.com",
  "browser_specific_settings": {
    "gecko": {
      "id": "extension@wishlistwatcher.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}