Examine source code of Savematic: Save for What You Want

{
  "manifest_version": 2,
  "name": "Savematic — Save for What You Want",
  "version": "1.5.2",
  "description": "Track savings goals for products you want. See real-time prices, get drop alerts, and know exactly when you can afford each item. Savematic participates in affiliate programs including Amazon Associates and eBay Partner Network. We may earn from qualifying purchases made through savematic.app.",
  "icons": {
    "16": "assets/icon-16.png",
    "32": "assets/icon-32.png",
    "48": "assets/icon-48.png",
    "128": "assets/icon-128.png"
  },
  "permissions": [
    "storage",
    "alarms",
    "notifications",
    "https://savematic.app/*",
    "https://savematic-scraper.x-loot-x.workers.dev/*",
    "https://*.amazon.com/*",
    "https://*.pcpartpicker.com/*",
    "https://*.walmart.com/*",
    "https://*.bestbuy.com/*",
    "https://*.target.com/*",
    "https://*.ebay.com/*",
    "https://*.homedepot.com/*",
    "https://*.lowes.com/*",
    "https://*.newegg.com/*",
    "https://*.etsy.com/*",
    "https://*.bhphotovideo.com/*",
    "https://*.gamestop.com/*",
    "https://*.adorama.com/*",
    "https://*.temu.com/*"
  ],
  "background": {
    "scripts": [
      "background/service-worker.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.amazon.com/dp/*",
        "https://*.amazon.com/gp/product/*",
        "https://*.amazon.com/*/dp/*"
      ],
      "js": [
        "content/amazon.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://pcpartpicker.com/list/*",
        "https://www.pcpartpicker.com/list/*",
        "https://pcpartpicker.com/guide/*",
        "https://www.pcpartpicker.com/guide/*",
        "https://pcpartpicker.com/user/*/saved/*",
        "https://www.pcpartpicker.com/user/*/saved/*",
        "https://pcpartpicker.com/b/*",
        "https://www.pcpartpicker.com/b/*",
        "https://pcpartpicker.com/product/*",
        "https://www.pcpartpicker.com/product/*"
      ],
      "js": [
        "content/pcpartpicker.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://*.walmart.com/*",
        "https://*.bestbuy.com/*",
        "https://*.target.com/*",
        "https://*.ebay.com/*",
        "https://*.homedepot.com/*",
        "https://*.lowes.com/*",
        "https://*.newegg.com/*",
        "https://*.etsy.com/*",
        "https://*.bhphotovideo.com/*",
        "https://*.gamestop.com/*",
        "https://*.adorama.com/*",
        "https://*.temu.com/*"
      ],
      "js": [
        "content/retailer.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://*.amazon.com/*",
        "https://*.pcpartpicker.com/*",
        "https://*.walmart.com/*",
        "https://*.bestbuy.com/*",
        "https://*.target.com/*",
        "https://*.ebay.com/*",
        "https://*.homedepot.com/*",
        "https://*.lowes.com/*",
        "https://*.newegg.com/*",
        "https://*.etsy.com/*",
        "https://*.bhphotovideo.com/*",
        "https://*.gamestop.com/*",
        "https://*.adorama.com/*",
        "https://*.temu.com/*"
      ],
      "js": [
        "content/generic.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://savematic.app/*"
      ],
      "js": [
        "content/savematic.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "assets/icon-16.png",
      "32": "assets/icon-32.png",
      "48": "assets/icon-48.png"
    }
  },
  "web_accessible_resources": [
    "assets/icon-16.png",
    "assets/icon-32.png",
    "assets/icon-48.png",
    "assets/icon-128.png"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "savematic@calcmatic.app",
      "data_collection_permissions": {
        "required": [
          "websiteContent"
        ],
        "optional": []
      }
    }
  }
}