Install Bug Magnet
Go to a page with input fields of type text, email, etc (example w3schools page)
Right click in the field, the Bug Magnet menu item is missing.
Go to a page with textarea fields (example w3schools page)
Right click in the field, open the Bug Magnet menu item, choose to fill the field with something - nothing is filled.
Right click menu on input type text/email/etc to show the Bug Magnet menu item.
Choosing an item from the right click menu to fill the selected form field with the specified text.
Version 0.99.133-beta (WebKit 621.1.2.111.4) Build date April 21, 2025 Mac 15.5 (Build 24F74)
Sequoia (15)