Examine source code of Name Replacer

{
  "manifest_version": 2,
  "name": "Name Replacer",
  "version": "1.0",
  "description": "Replaces name text.",
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "content_script.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{e57b3b0e-6d92-4933-add0-124c9f91c665}"
    }
  }
}