Examine source code of G-Account Switcher

{
  "manifest_version": 3,
  "name": "G-Account Switcher",
  "version": "3.1.4",
  "description": "Assign specific Google accounts to individual Google sites. Optionally set a global default across all Google services.",
  "permissions": [
    "storage",
    "tabs",
    "declarativeNetRequest",
    "scripting",
    "cookies"
  ],
  "host_permissions": [
    "*://*.google.com/*",
    "*://*.youtube.com/*",
    "*://gmail.com/*",
    "*://*.gmail.com/*"
  ],
  "background": {
    "scripts": [
      "src/background.js"
    ],
    "type": "module"
  },
  "action": {
    "default_popup": "src/popup/popup.html"
  },
  "icons": {
    "16": "src/icons/icon16.png",
    "32": "src/icons/icon32.png",
    "48": "src/icons/icon48.png",
    "128": "src/icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "g-account-switcher@example.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}