Examine source code of Mortar: Real Estate Deal Analyzer

{
  "manifest_version": 3,
  "name": "Mortar: Real Estate Deal Analyzer",
  "short_name": "Mortar",
  "version": "1.0.0",
  "description": "Open a listing on Zillow, Redfin, Realtor.com, or Homes.com. Mortar reads the numbers, tells you if the deal is worth it.",
  "icons": {
    "16": "icons/16.png",
    "32": "icons/32.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "action": {
    "default_popup": "popup/popup.html",
    "default_title": "Mortar",
    "default_icon": {
      "16": "icons/16.png",
      "32": "icons/32.png",
      "48": "icons/48.png",
      "128": "icons/128.png"
    }
  },
  "background": {
    "scripts": [
      "background/service-worker.js"
    ],
    "type": "module"
  },
  "host_permissions": [
    "https://mortar-api-z8uo.vercel.app/*",
    "https://*.zillow.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://*.zillow.com/*"
      ],
      "js": [
        "content/onboarding-tour.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "assets/mortar-idle.png",
        "assets/mortar-buy.png",
        "assets/mortar-investigate.png",
        "assets/mortar-pass.png"
      ],
      "matches": [
        "https://*.zillow.com/*"
      ]
    }
  ],
  "permissions": [
    "storage",
    "activeTab",
    "scripting"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "mortar@bricks.investments",
      "strict_min_version": "121.0",
      "data_collection_permissions": {
        "required": [
          "websiteContent"
        ],
        "optional": [
          "authenticationInfo"
        ]
      }
    }
  }
}