Examine source code of User Agent

{
  "manifest_version": 2,
  "name": "__MSG_extName__",
  "short_name": "SandAgent",
  "version": "2.1",
  "description": "__MSG_extDesc__",
  "default_locale": "en",
  "author": "SandVPN",
  "homepage_url": "https://sandvpn.com",
  "browser_specific_settings": {
    "gecko": {
      "id": "sandvpn_@sandvpn_.com",
      "strict_min_version": "91.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "webNavigation",
    "storage",
    "tabs",
    "http://*/*",
    "https://*/*"
  ],
  "background": {
    "scripts": [
      "js/shared/profiles.js",
      "js/shared/derive.js",
      "js/shared/probe.js",
      "js/background/rules.js",
      "js/background/headers.js",
      "js/background/spoof.js",
      "js/background/main.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_title": "SandAgent",
    "default_popup": "popup/popup.html",
    "default_icon": {
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    }
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  }
}