Is tkm-gchat-ext safe?

Adds customization, navigation, and formatting tools to Google Chat.

This extension adds Google Chat features such as mentioned-message navigation, message URL copying, read-later lists, space display-name changes, color labels, list reordering, and resizable chat and space lists. It also supports custom reaction emoji sets, styled code blocks and block quotes, datetime format changes, user ID display, shortcut keys, English, Japanese, and dark or light mode.