manifest.json

{
  "manifest_version": 3,
  "name": "SourceCalc - 1688 Profit Calculator",
  "version": "0.1.0",
  "description": "Instantly calculate your profit margin when sourcing from 1688 for Amazon, Shopify, and other platforms. See real costs including shipping, customs, and fees.",
  "permissions": ["storage", "activeTab"],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "content_scripts": [
    {
      "matches": ["*://*.1688.com/*"],
      "js": ["content.js"],
      "css": ["content.css"]
    }
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png"
    }
  },
  "background": {
    "service_worker": "background.js"
  }
}