Is MultiField CopyCat - Copy, Paste & Autofill Forms Instantly safe?

Bulk copy, paste, and autofill web form fields to speed up repeated form entry.

This extension lets you drag to select multiple form fields, copy their values, and paste them into another form. It can copy all form data on a page, save form data for later autofill, apply saved values to the current page, and use sequential or Smart Match paste modes.