Examine source code of Privacy Redirect

{
  "manifest_version": 2,
  "name": "Privacy Redirect",
  "version": "0.1.9",
  "description": "Remove all known trackers and hide your referrer before redirecting to another site",
  "icons": {
    "48": "icon-48.png",
    "128": "icon-128.png",
    "148": "icon.png"
  },
  "background": {
    "scripts": [
      "script.js"
    ]
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "*://*/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{5683036d-b72a-428c-9ef4-0a7be8db88e2}"
    }
  }
}