Examine source code of Privacy By Urls

{
  "manifest_version": 2,
  "name": "Privacy By Urls",
  "version": "1.0",
  "description": "Removes tracking parameters from URLs",
  "permissions": [
    "<all_urls>"
  ],
  "icons": {
    "16": "icons/icon-48.png",
    "48": "icons/icon-96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "cleanurl.js",
        "main_url.js"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "cleanurl.js",
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{8fd05911-f7ec-4af7-9c53-5b39f5abc4a2}"
    }
  }
}