This (Will) provides new keyboard shortcut and auto completion.
Download .crx file from releases
Go to chrome://extension on your chrome and drag & drop downloaded .crx file.
Open room dialog for unread mentioned and messages.
Type Cmd + i to open dialog. If you are using slack, this is equivalent Cmd + k in slack.
Manage list of favorite(starred) message list.
Fav button is appeared in message tool tip
Messages are listed up in top right bar
This is only in extension. The list is not shared between mobile application, desktop application.
Type @ in chat message area to open member list.
I don't take any responsibility even if you had trouble caused by this extension. Please use this in your own responsibility.