Examine source code of Sidebar Notes

{
  "manifest_version": 2,
  "name": "Sidebar Notes",
  "version": "1.1",
  "description": "A simple notes extension integrated into Firefox's native sidebar panel.",
  "browser_specific_settings": {
    "gecko": {
      "id": "sidebar-notes-ext@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage"
  ],
  "icons": {
    "16": "icons/notepad-text-16.svg",
    "48": "icons/notepad-text-32.svg",
    "96": "icons/notepad-text-48.svg"
  },
  "sidebar_action": {
    "default_title": "Notes",
    "default_panel": "sidebar.html",
    "default_icon": {
      "16": "icons/notepad-text-16.svg",
      "32": "icons/notepad-text-32.svg",
      "48": "icons/notepad-text-48.svg"
    }
  },
  "commands": {
    "_execute_sidebar_action": {
      "suggested_key": {
        "default": "Ctrl+Period",
        "mac": "Command+Period"
      }
    }
  }
}