Examine source code of HouseHunter

{
  "manifest_version": 2,
  "name": "HouseHunter",
  "description": "Compare properties across NZ real estate platforms including TradeMe, RealEstate.co.nz, OneRoof, and Homes.co.nz",
  "version": "1.0.9",
  "icons": {
    "16": "icon-16.png",
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "permissions": [
    "storage",
    "activeTab",
    "contextMenus",
    "notifications",
    "scripting",
    "https://www.trademe.co.nz/*",
    "https://www.realestate.co.nz/*",
    "https://platform.realestate.co.nz/*",
    "https://homes.co.nz/*",
    "https://www.oneroof.co.nz/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "househunter-nz@hugo",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "websiteContent"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "HouseHunter",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://homes.co.nz/address/**",
        "https://www.oneroof.co.nz/property/**",
        "https://www.realestate.co.nz/*/residential/rent/*",
        "https://www.realestate.co.nz/*/residential/sale/*",
        "https://www.realestate.co.nz/*/rural/sale/*",
        "https://www.realestate.co.nz/property/*/*",
        "https://www.trademe.co.nz/a/property/insights/profile/*/*/*/*",
        "https://www.trademe.co.nz/a/property/new-homes/house-land/*/*/*/listing/*",
        "https://www.trademe.co.nz/a/property/new-homes/new-house/*/*/*/listing/*",
        "https://www.trademe.co.nz/a/property/residential/lifestyle-property/*/*/*/listing/*",
        "https://www.trademe.co.nz/a/property/residential/rent/*/*/*/listing/*",
        "https://www.trademe.co.nz/a/property/residential/sale/*/*/*/listing/*",
        "https://www.trademe.co.nz/a/property/residential/sections-for-sale/*/*/*/listing/*"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/content.js"
      ]
    }
  ]
}