Examine source code of Real Estate Listing Parser

{
  "manifest_version": 3,
  "name": "Real Estate Listing Parser",
  "version": "1.0.0",
  "description": "Extract property metadata from Mubawab, Sarouty & Agenz listing pages with one click. Export to CSV instantly.",
  "author": "Real Estate Listing Parser",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "activeTab",
    "storage",
    "scripting",
    "management"
  ],
  "host_permissions": [
    "https://*.mubawab.ma/*",
    "https://*.mubawab.com/*",
    "https://*.sarouty.ma/*",
    "https://*.agenz.ma/*",
    "https://*.avito.ma/*",
    "https://*.zillow.com/*",
    "https://*.rightmove.co.uk/*",
    "https://*.idealista.com/*",
    "https://*.idealista.it/*",
    "https://*.idealista.pt/*",
    "https://*.immobilienscout24.de/*",
    "https://*.immobilienscout24.at/*",
    "https://*.propertyfinder.ae/*",
    "https://*.extensionpay.com/*",
    "https://extensionpay.com/*",
    "https://open.er-api.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.mubawab.ma/*",
        "https://*.mubawab.com/*",
        "https://*.sarouty.ma/*",
        "https://*.agenz.ma/*",
        "https://*.avito.ma/*",
        "https://*.zillow.com/*",
        "https://*.rightmove.co.uk/*",
        "https://*.idealista.com/*",
        "https://*.idealista.it/*",
        "https://*.idealista.pt/*",
        "https://*.immobilienscout24.de/*",
        "https://*.immobilienscout24.at/*",
        "https://*.propertyfinder.ae/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "sidebar_action": {
    "default_title": "RE Listing Parser",
    "default_panel": "sidepanel.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "action": {
    "default_title": "Real Estate Listing Parser",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "web_accessible_resources": [
    {
      "resources": [
        "sidepanel.html",
        "sidepanel.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "re-listing-parser@example.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}