Examine source code of PrivacyBlur: Auto-Hide Sensitive Data

{
  "manifest_version": 3,
  "name": "Privacy Blur",
  "version": "1.0.1",
  "description": "Blurs sensitive text such as emails, phone numbers, and usernames on webpages.",
  "permissions": [
    "activeTab",
    "scripting",
    "storage"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "action": {
    "default_title": "Privacy Blur",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "styles.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "privacyblur@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}