Password Lock for WhatsApp Web is a Firefox extension designed to enhance the security of your WhatsApp Web account. This subscription-based tool offers two operational modes: a password prompt upon opening WhatsApp Web or a timed prompt that activates after a specified period of inactivity. Users can easily set up the extension by entering and confirming a password after installation, ensuring that unauthorized access is prevented after the initial setup.

In addition to its primary locking feature, the extension allows users to lock all open instances of WhatsApp with a single action button. This ensures that even if multiple windows are open, security is maintained. Users can also customize their experience by configuring a keyboard shortcut for quick access to the lock feature. Furthermore, the extension includes the option to disable the locking of the right-click context menu, providing flexibility in how users interact with WhatsApp Web.