Examine source code of Shortcut Hinter

{
  "manifest_version": 2,
  "name": "Shortcut Hinter",
  "description": "Show a unified list of keyboard shortcuts for the current site",
  "version": "1.0",
  "icons": {
    "64": "icons/icon-64.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_icon": "icons/icon-64.png",
    "default_title": "Shortcut Hinter",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{fa2aefc7-8f1d-45f5-a565-2e752d256937}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "strict_min_version": "126.0"
    }
  }
}