Examine source code of MyBrowser Vpn

{
  "name": "My Browser Vpn",
  "description": "Use this proxy tool to change your IP address easy",
  "version": "2.6.8",
  "manifest_version": 2,
  "applications": {
    "gecko": {
      "id": "firefox@mybrowservpn.com",
      "strict_min_version": "60.0"
    }
  },
  "browser_action": {
    "default_title": "Proxy VPN Tool",
    "default_popup": "index.html"
  },
  "icons": {
    "16": "icons/on16.png",
    "48": "icons/on48.png",
    "128": "icons/on128.png",
    "256": "icons/on256.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "permissions": [
    "proxy",
    "storage",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>",
    "tabs"
  ],
  "web_accessible_resources": [
    "moz-extension://*",
    "fonts/*"
  ],
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'"
}