Examine source code of PriceTrail

{
  "manifest_version": 3,
  "name": "PriceTrail",
  "version": "1.4.0",
  "description": "Price history and drop alerts across UK retail. Records prices as you browse - no account, data stays on your device.",
  "permissions": [
    "storage",
    "alarms",
    "notifications"
  ],
  "host_permissions": [
    "https://www.amazon.co.uk/*",
    "https://www.argos.co.uk/*",
    "https://www.currys.co.uk/*",
    "https://www.johnlewis.com/*",
    "https://www.ebay.co.uk/*",
    "https://www.smythstoys.com/*",
    "https://www.lego.com/*",
    "https://www.screwfix.com/*",
    "https://www.very.co.uk/*",
    "https://ao.com/*",
    "https://www.ao.com/*",
    "https://www.amazon.com/*",
    "https://www.overclockers.co.uk/*",
    "https://www.etsy.com/*",
    "https://nasa.taildce623.ts.net/*",
    "https://www.diy.com/*",
    "https://www.toolstation.com/*",
    "https://www.boots.com/*",
    "https://www.marksandspencer.com/*",
    "https://www.tesco.com/*",
    "https://www.next.co.uk/*",
    "https://www.asda.com/*",
    "https://groceries.asda.com/*",
    "https://www.sainsburys.co.uk/*",
    "https://www.ikea.com/*",
    "https://www.dunelm.com/*",
    "https://www.superdrug.com/*",
    "https://www.lookfantastic.com/*",
    "https://www.cultbeauty.com/*",
    "https://www.cultbeauty.co.uk/*",
    "https://www.spacenk.com/*",
    "https://www.beautybay.com/*",
    "https://www.allbeauty.com/*",
    "https://www.sephora.com/*",
    "https://www.ulta.com/*",
    "https://www.bathandbodyworks.com/*",
    "https://www.fragrancenet.com/*",
    "https://www.sallybeauty.com/*",
    "https://www.dermstore.com/*",
    "https://www.douglas.de/*",
    "https://www.douglas.nl/*",
    "https://www.douglas.at/*",
    "https://www.notino.co.uk/*",
    "https://www.notino.com/*",
    "https://www.zalando.co.uk/*",
    "https://www.zalando.de/*",
    "https://www.primor.eu/*",
    "https://www.druni.es/*",
    "https://www.dm.de/*",
    "https://www.mecca.com/*",
    "https://www.mecca.com.au/*",
    "https://www.sephora.com.au/*",
    "https://www.yesstyle.com/*",
    "https://www.stylevana.com/*",
    "https://www.asos.com/*",
    "https://www2.hm.com/*",
    "https://www.hm.com/*",
    "https://www.zara.com/*",
    "https://shop.mango.com/*",
    "https://www.boohoo.com/*",
    "https://www.prettylittlething.com/*",
    "https://www.uniqlo.com/*",
    "https://www.cos.com/*",
    "https://www.arket.com/*",
    "https://www.allsaints.com/*",
    "https://www.reiss.com/*",
    "https://www.stories.com/*",
    "https://uk.sandro-paris.com/*",
    "https://www.sandro-paris.com/*",
    "https://www.selfridges.com/*",
    "https://www.net-a-porter.com/*",
    "https://www.flannels.com/*",
    "https://uk.gymshark.com/*",
    "https://www.gymshark.com/*",
    "https://www.sweatybetty.com/*",
    "https://www.urbanoutfitters.com/*",
    "https://www.thereformation.com/*",
    "https://www.seasaltcornwall.com/*",
    "https://www.princesspolly.com/*",
    "https://us.princesspolly.com/*"
  ],
  "background": {
    "scripts": [
      "src/lib/config.js",
      "src/lib/jsonld.js",
      "src/adapters/registry.js",
      "src/adapters/generic-jsonld.js",
      "src/adapters/amazon.js",
      "src/adapters/argos.js",
      "src/adapters/currys.js",
      "src/adapters/johnlewis.js",
      "src/adapters/ebay.js",
      "src/adapters/smyths.js",
      "src/adapters/lego.js",
      "src/adapters/screwfix.js",
      "src/adapters/very.js",
      "src/adapters/ao.js",
      "src/adapters/overclockers.js",
      "src/adapters/etsy.js",
      "src/adapters/bandq.js",
      "src/adapters/toolstation.js",
      "src/adapters/boots.js",
      "src/adapters/universal.js",
      "src/background/service-worker.js"
    ]
  },
  "action": {
    "default_popup": "src/popup/popup.html",
    "default_title": "PriceTrail"
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.amazon.co.uk/*",
        "https://www.argos.co.uk/*",
        "https://www.currys.co.uk/*",
        "https://www.johnlewis.com/*",
        "https://www.ebay.co.uk/*",
        "https://www.smythstoys.com/*",
        "https://www.lego.com/*",
        "https://www.screwfix.com/*",
        "https://www.very.co.uk/*",
        "https://ao.com/*",
        "https://www.ao.com/*",
        "https://www.amazon.com/*",
        "https://www.overclockers.co.uk/*",
        "https://www.etsy.com/*",
        "https://www.diy.com/*",
        "https://www.toolstation.com/*",
        "https://www.boots.com/*",
        "https://www.marksandspencer.com/*",
        "https://www.tesco.com/*",
        "https://www.next.co.uk/*",
        "https://www.asda.com/*",
        "https://groceries.asda.com/*",
        "https://www.sainsburys.co.uk/*",
        "https://www.ikea.com/*",
        "https://www.dunelm.com/*",
        "https://www.superdrug.com/*",
        "https://www.lookfantastic.com/*",
        "https://www.cultbeauty.com/*",
        "https://www.cultbeauty.co.uk/*",
        "https://www.spacenk.com/*",
        "https://www.beautybay.com/*",
        "https://www.allbeauty.com/*",
        "https://www.sephora.com/*",
        "https://www.ulta.com/*",
        "https://www.bathandbodyworks.com/*",
        "https://www.fragrancenet.com/*",
        "https://www.sallybeauty.com/*",
        "https://www.dermstore.com/*",
        "https://www.douglas.de/*",
        "https://www.douglas.nl/*",
        "https://www.douglas.at/*",
        "https://www.notino.co.uk/*",
        "https://www.notino.com/*",
        "https://www.zalando.co.uk/*",
        "https://www.zalando.de/*",
        "https://www.primor.eu/*",
        "https://www.druni.es/*",
        "https://www.dm.de/*",
        "https://www.mecca.com/*",
        "https://www.mecca.com.au/*",
        "https://www.sephora.com.au/*",
        "https://www.yesstyle.com/*",
        "https://www.stylevana.com/*",
        "https://www.asos.com/*",
        "https://www2.hm.com/*",
        "https://www.hm.com/*",
        "https://www.zara.com/*",
        "https://shop.mango.com/*",
        "https://www.boohoo.com/*",
        "https://www.prettylittlething.com/*",
        "https://www.uniqlo.com/*",
        "https://www.cos.com/*",
        "https://www.arket.com/*",
        "https://www.allsaints.com/*",
        "https://www.reiss.com/*",
        "https://www.stories.com/*",
        "https://uk.sandro-paris.com/*",
        "https://www.sandro-paris.com/*",
        "https://www.selfridges.com/*",
        "https://www.net-a-porter.com/*",
        "https://www.flannels.com/*",
        "https://uk.gymshark.com/*",
        "https://www.gymshark.com/*",
        "https://www.sweatybetty.com/*",
        "https://www.urbanoutfitters.com/*",
        "https://www.thereformation.com/*",
        "https://www.seasaltcornwall.com/*",
        "https://www.princesspolly.com/*",
        "https://us.princesspolly.com/*"
      ],
      "js": [
        "src/lib/config.js",
        "src/lib/jsonld.js",
        "src/lib/chart.js",
        "src/adapters/registry.js",
        "src/adapters/generic-jsonld.js",
        "src/adapters/amazon.js",
        "src/adapters/argos.js",
        "src/adapters/currys.js",
        "src/adapters/johnlewis.js",
        "src/adapters/ebay.js",
        "src/adapters/smyths.js",
        "src/adapters/lego.js",
        "src/adapters/screwfix.js",
        "src/adapters/very.js",
        "src/adapters/ao.js",
        "src/adapters/overclockers.js",
        "src/adapters/etsy.js",
        "src/adapters/bandq.js",
        "src/adapters/toolstation.js",
        "src/adapters/boots.js",
        "src/adapters/universal.js",
        "src/content/content.js"
      ],
      "css": [
        "src/content/overlay.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "optional_host_permissions": [
    "http://*/*",
    "https://*/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "pricetrail@pricetrail.dev",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "websiteContent"
        ],
        "optional": [
          "personallyIdentifyingInfo"
        ]
      }
    }
  }
}