Formlet is a Firefox extension designed for web developers and users who frequently fill out forms. This subscription-based tool simplifies the process of saving form data as bookmarklets, allowing for easy autofilling across various browsers. Inspired by the now-defunct Form Saver, Formlet retains a straightforward approach, ensuring that users can quickly save and retrieve form information without complex configurations. The extension is particularly useful for testing forms, making it a valuable addition to any web developer's toolkit.

To use Formlet, users can fill out a form, right-click to access the context menu, and select 'Save form with Formlet'. A confirmation notification will appear, and users can later find the bookmark to autofill the form with the saved data. This functionality not only enhances productivity but also ensures compatibility with different browsers, making it a versatile solution for form management.