Examine source code of RealHandles

{
  "manifest_version": 3,
  "name": "RealHandles",
  "version": "0.1.0",
  "description": "Tells you whether this profile or site belongs to a verified RealHandles identity. Matched on your device. The URL is never sent.",
  "homepage_url": "https://realhandles.com",
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "action": {
    "default_title": "RealHandles",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "background": {
    "scripts": [
      "lib/background.js"
    ]
  },
  "permissions": [
    "tabs",
    "storage",
    "alarms"
  ],
  "host_permissions": [
    "https://realhandles.com/*"
  ],
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Alt+Shift+R",
        "mac": "Alt+Shift+R"
      },
      "description": "Open the RealHandles popup"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "extension@realhandles.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}