Examine source code of Blur Names

{
  "manifest_version": 2,
  "name": "Blur Names",
  "version": "1.0",
  "description": "Blur or hide detected names on web pages to avoid distraction or leakage in screenshots.",
  "permissions": [
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{4921bcee-6bf7-4876-adb8-8abb331f56ac}"
    }
  }
}