Examine source code of PriceDropCatch

{
  "manifest_version": 3,
  "name": "PriceDropCatch - Tracker for Amazon & More",
  "version": "1.9",
  "description": "One-click price tracking, history charts, and price drop alerts when your target price is reached. No account required.",
  "permissions": [
    "storage",
    "notifications",
    "tabs",
    "alarms"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "affiliate.js",
      "offscreen.js",
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.amazon.com/*",
        "*://*.amazon.ca/*",
        "*://*.amazon.co.uk/*",
        "*://*.amazon.de/*",
        "*://*.amazon.fr/*",
        "*://*.amazon.it/*",
        "*://*.amazon.es/*",
        "*://*.amazon.co.jp/*",
        "*://*.amazon.in/*",
        "*://*.amazon.com.au/*",
        "*://*.amazon.com.br/*",
        "*://*.amazon.com.mx/*",
        "*://*.amazon.nl/*",
        "*://*.amazon.se/*",
        "*://*.amazon.pl/*",
        "*://*.amazon.sg/*",
        "*://*.amazon.ae/*",
        "*://*.amazon.sa/*",
        "*://*.amazon.com.be/*",
        "*://*.amazon.com.tr/*",
        "*://*.amazon.eg/*"
      ],
      "js": [
        "adapters/amazon.js",
        "content.js"
      ]
    },
    {
      "matches": [
        "*://*.walmart.com/*",
        "*://*.walmart.ca/*"
      ],
      "js": [
        "adapters/walmart.js",
        "content.js"
      ]
    },
    {
      "matches": [
        "*://*.ebay.com/*",
        "*://*.ebay.ca/*",
        "*://*.ebay.co.uk/*",
        "*://*.ebay.de/*",
        "*://*.ebay.fr/*",
        "*://*.ebay.it/*",
        "*://*.ebay.es/*",
        "*://*.ebay.nl/*",
        "*://*.ebay.at/*",
        "*://*.ebay.be/*",
        "*://*.ebay.ie/*",
        "*://*.ebay.pl/*",
        "*://*.ebay.com.au/*",
        "*://*.ebay.com.sg/*",
        "*://*.ebay.com.hk/*"
      ],
      "js": [
        "adapters/ebay.js",
        "content.js"
      ]
    },
    {
      "matches": [
        "*://*.bestbuy.com/*"
      ],
      "js": [
        "adapters/bestbuy.js",
        "content.js"
      ]
    },
    {
      "matches": [
        "*://*.newegg.com/*"
      ],
      "js": [
        "adapters/newegg.js",
        "content.js"
      ]
    },
    {
      "matches": [
        "*://*.apple.com/*"
      ],
      "js": [
        "adapters/apple.js",
        "content.js"
      ]
    },
    {
      "matches": [
        "*://*.etsy.com/*"
      ],
      "js": [
        "adapters/etsy.js",
        "content.js"
      ]
    },
    {
      "matches": [
        "*://*.wayfair.com/*",
        "*://*.wayfair.ca/*"
      ],
      "js": [
        "adapters/wayfair.js",
        "content.js"
      ]
    },
    {
      "matches": [
        "*://*.sephora.com/*",
        "*://*.sephora.ca/*"
      ],
      "js": [
        "adapters/sephora.js",
        "content.js"
      ]
    },
    {
      "matches": [
        "*://*.target.com/*"
      ],
      "js": [
        "adapters/target.js",
        "content.js"
      ]
    },
    {
      "matches": [
        "*://*.samsclub.com/*"
      ],
      "js": [
        "adapters/samsclub.js",
        "content.js"
      ]
    },
    {
      "matches": [
        "*://*.microcenter.com/*"
      ],
      "js": [
        "adapters/microcenter.js",
        "content.js"
      ]
    },
    {
      "matches": [
        "*://*.nike.com/*"
      ],
      "js": [
        "adapters/nike.js",
        "content.js"
      ]
    },
    {
      "matches": [
        "*://*.jomashop.com/*"
      ],
      "js": [
        "adapters/jomashop.js",
        "content.js"
      ]
    },
    {
      "matches": [
        "*://*.dell.com/*"
      ],
      "js": [
        "adapters/dell.js",
        "content.js"
      ]
    },
    {
      "matches": [
        "*://*.hp.com/*"
      ],
      "js": [
        "adapters/hp.js",
        "content.js"
      ]
    },
    {
      "matches": [
        "*://*.officedepot.com/*"
      ],
      "js": [
        "adapters/officedepot.js",
        "content.js"
      ]
    },
    {
      "matches": [
        "*://*.qvc.com/*"
      ],
      "js": [
        "adapters/qvc.js",
        "content.js"
      ]
    },
    {
      "matches": [
        "*://*.kohls.com/*"
      ],
      "js": [
        "adapters/kohls.js",
        "content.js"
      ]
    },
    {
      "matches": [
        "*://*.bhphotovideo.com/*"
      ],
      "js": [
        "adapters/bhphoto.js",
        "content.js"
      ]
    },
    {
      "matches": [
        "*://*.lego.com/*"
      ],
      "js": [
        "adapters/lego.js",
        "content.js"
      ]
    },
    {
      "matches": [
        "*://*.usa.canon.com/*"
      ],
      "js": [
        "adapters/canon.js",
        "content.js"
      ]
    },
    {
      "matches": [
        "*://direct.playstation.com/*"
      ],
      "js": [
        "adapters/playstationdirect.js",
        "content.js"
      ]
    },
    {
      "matches": [
        "*://*.jcpenney.com/*"
      ],
      "js": [
        "adapters/jcpenney.js",
        "content.js"
      ]
    },
    {
      "matches": [
        "*://*.acehardware.com/*"
      ],
      "js": [
        "adapters/acehardware.js",
        "content.js"
      ]
    },
    {
      "matches": [
        "*://*.hsn.com/*"
      ],
      "js": [
        "adapters/hsn.js",
        "content.js"
      ]
    },
    {
      "matches": [
        "*://*.chewy.com/*"
      ],
      "js": [
        "adapters/chewy.js",
        "content.js"
      ]
    },
    {
      "matches": [
        "*://*.lenovo.com/*"
      ],
      "js": [
        "adapters/lenovo.js",
        "content.js"
      ]
    }
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "icons/icon128.png",
        "icons/icon48.png",
        "icons/icon32.png"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "pricedropcatch@example.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "browsingActivity",
          "websiteContent",
          "personallyIdentifyingInfo"
        ]
      }
    }
  }
}