Examine source code of Social Previewer

{
  "manifest_version": 3,
  "name": "Social Previewer",
  "version": "1.0",
  "description": "Instantly preview OpenGraph and Twitter cards on your local builds.",
  "action": {
    "default_title": "Show Social Preview"
  },
  "permissions": [
    "activeTab",
    "scripting"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "socialpreviewer@yourdomain.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}