Examine source code of WA Privacy Blur

{
  "manifest_version": 2,
  "name": "WA Privacy Blur",
  "version": "1.3",
  "description": "Blurs WhatsApp Web names, previews, avatars, and messages. Hover to reveal.",
  "icons": {
    "48": "icon-48.png",
    "96": "icon-96.png",
    "128": "icon-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://web.whatsapp.com/*"
      ],
      "js": [
        "blur.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "wa-privacy-blur@jamelwa.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "permissions": [
    "storage",
    "*://web.whatsapp.com/*"
  ]
}