Examine source code of Account switcher for eBay

{
  "manifest_version": 2,
  "name": "Account switcher for eBay",
  "version": "1.0",
  "description": "Switch between eBay-Accounts easily",
  "icons": {
    "128": "src/assets/icon.svg"
  },
  "permissions": [
    "https://*.ebay.de/*",
    "https://*.ebay.com/*",
    "activeTab",
    "storage"
  ],
  "browser_action": {
    "default_title": "Switch account",
    "default_icon": "src/assets/icon.svg",
    "default_popup": "dist/index.html"
  }
}