Examine source code of SourceHound

{
  "manifest_version": 2,
  "name": "SourceHound",
  "description": "Inline AI profit estimates on Facebook Marketplace, eBay, and ShopGoodwill. See expected profit on every listing as you browse.",
  "version": "0.1.0",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "storage",
    "identity",
    "declarativeNetRequest",
    "https://www.facebook.com/marketplace/*",
    "https://www.ebay.com/*",
    "https://shopgoodwill.com/*",
    "https://www.sourcehound.ai/*",
    "https://*.auth0.com/*"
  ],
  "declarative_net_request": {
    "rule_resources": [
      {
        "id": "auth0-cors",
        "enabled": true,
        "path": "rules/cors.json"
      }
    ]
  },
  "web_accessible_resources": [
    "icons/icon-128.png"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{eeaa3636-e41a-4d3b-9ff7-76f750bb4502}",
      "strict_min_version": "113.0",
      "data_collection_permissions": {
        "required": [
          "personallyIdentifyingInfo",
          "authenticationInfo",
          "websiteContent",
          "websiteActivity"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "SourceHound",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.ebay.com/b/*",
        "https://www.ebay.com/itm/*",
        "https://www.ebay.com/sch/*"
      ],
      "run_at": "document_idle",
      "js": [
        "content-scripts/ebay.js"
      ]
    },
    {
      "matches": [
        "https://www.facebook.com/marketplace/*"
      ],
      "run_at": "document_idle",
      "js": [
        "content-scripts/facebook.js"
      ]
    },
    {
      "matches": [
        "https://shopgoodwill.com/*"
      ],
      "run_at": "document_idle",
      "js": [
        "content-scripts/shopgoodwill.js"
      ]
    }
  ]
}