Examine source code of ListingMap: property search assistant

{
  "manifest_version": 3,
  "name": "ListingMap: property search assistant",
  "version": "0.8.2",
  "description": "What's nearby with real travel times, floor area, and what a rental really costs a month with council tax and bills.",
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "action": {
    "default_title": "ListingMap: view this listing on your map",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "listingmap@listingmap.site",
      "strict_min_version": "127.0",
      "data_collection_permissions": {
        "required": [
          "locationInfo"
        ]
      }
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.rightmove.co.uk/*",
        "https://www.zoopla.co.uk/*",
        "https://www.onthemarket.com/*",
        "https://*.zillow.com/*",
        "https://*.realtor.com/*",
        "https://*.redfin.com/*",
        "https://*.realtor.ca/*",
        "https://*.idealista.com/*",
        "https://*.idealista.it/*",
        "https://*.idealista.pt/*",
        "https://*.immobiliare.it/*",
        "https://*.immobilienscout24.de/*",
        "https://*.funda.nl/*",
        "https://*.seloger.com/*",
        "https://*.daft.ie/*",
        "https://*.realestate.com.au/*",
        "https://*.domain.com.au/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "button.css"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "https://www.listingmap.site/*"
      ],
      "js": [
        "bridge.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ]
}