You can use http://refract.mkelly.me/ http://refract.mkelly.me/ to install Slack as a standalone web app (in Firefox and Chrome). I've done this to many servic

You can use http://refract.mkelly.me/ http://refract.mkelly.me/ to install Slack as a standalone web app (in Firefox and Chrome). I've done this to many service which I use frequently: Trello, IRCCloud, Messenger, Inbox, etc. and it works really well. The added benefit is that I don't need to be logged into these services on my main profile.