Examine source code of PriceDaddy!

{
  "manifest_version": 3,
  "name": "PriceDaddy!",
  "version": "1.5",
  "description": "Get the price analytics and information for properties on realestate.com.au",
  "icons": {
    "16": "icon.png",
    "48": "icon.png",
    "128": "icon.png"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking"
  ],
  "host_permissions": [
    "https://www.walkscore.com/*",
    "https://places.nbnco.net.au/*",
    "https://www.realestate.com.au/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.realestate.com.au/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "pricedaddy@pricedaddy.com",
      "strict_min_version": "109.0"
    }
  }
}