Is Korean IME with Romanization Tool safe?

Type Korean Hangul in browser text fields without installing a system input method.

This extension adds a Dubeolsik Korean input mode that can be toggled from the toolbar icon or a keyboard shortcut. It works in standard text boxes, text areas, many rich-text editors, and Word for the Web, and includes an optional on-screen keyboard plus a right-click Romanization tool for selected Hangul text. The description says it works offline and does not collect, store, or transmit user data.