Examine source code of Ultimate Privacy Guard

{
  "manifest_version": 2,
  "name": "Ultimate Privacy Guard",
  "version": "3.0",
  "description": "Stealth anti-detection extension with full fingerprint spoofing for Waterfox.",
  "icons": {
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "permissions": [
    "<all_urls>",
    "webRequest",
    "webRequestBlocking",
    "tabs",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "ultimateprivacy@ext",
      "strict_min_version": "68.0"
    }
  }
}