Is SpeechAgent - Live Voice Typing safe?

Converts spoken words into text on webpages using the browser’s built-in speech recognition.

This extension lets you select an input field or text area, open its interface, and insert a speech transcript into the page. It supports language selection, alternative recognition results, continuous dictation, and copying recognized text to the clipboard. The description says it uses the built-in speech recognition API and has no server interaction related to the extension.