Web Slack does system notifications. You may have to turn them on explicitly because it requires a permission (can't recall if you do or if it prompts you, but it is something you have to enable), but if it's working in my Linux browser I'm assuming it works in Windows and OSX. I don't know if that would also integrate with in-dock notifications or not. If so, making it a viable alt-tab target would just be running it in a separate browser window, which should still net many fewer used resources than a separate app.

If you are happy, no problem. I'm posting for general info.

> can't recall if you do or if it prompts you, but it is something you have to enable

It does. In fact, it keeps displaying an annoying blue-colored topbar telling you that your life will be better if you enable notifications (fortunately, with the option to snooze it or dismiss it completely on given machine).

> In-dock notifications and system notifications are my reasons, as well as a dedicated window I can alt-tab to instead of tabbing through browser windows, then navigating to the Slack tab.

Emacs-slack can get you all of that:-)

I'm aware of the fact that Emacs is a fully fledged operating system :P

Just open in a separate chrome window?

In OS X, if I alt-tab over to Chrome, it will focus on whatever window I had in focus last; I'd still have to Command-Tilde to find the Slack one.

I know, it's a minor kvetch. But it's a minor kvetch I can solve with a gig of RAM.

Try Chrome web app mode: https://superuser.com/questions/33548/starting-google-chrome...

You may be interested in an app called HyperSwitch. It lets you tab between individual windows of each app! There’s also opt-tab which will cycle through individual app windows.