Examine source code of Multi-Account Manager

{
  "manifest_version": 2,
  "name": "__MSG_appName__",
  "default_locale": "en",
  "version": "1.0.1",
  "description": "__MSG_appDescription__",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "background": {
    "page": "background.html",
    "persistent": false
  },
  "permissions": [
    "storage",
    "unlimitedStorage",
    "cookies",
    "tabs",
    "activeTab",
    "<all_urls>",
    "https://api-pan.fextool.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "account-swithcher@fextool.com",
      "strict_min_version": "58.0",
      "data_collection_permissions": {
        "required": [
          "browsingActivity"
        ]
      }
    }
  }
}