Examine source code of ExpressVPN Extension

{
  "manifest_version": 2,
  "name": "ExpressVPN Extension",
  "version": "2.0",
  "description": "ExpressVPN placeholder extension",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "ExpressVPN",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "shariarja.m.an.1.9.98@gmail.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "activeTab"
  ]
}