What is slack doing? The process was in the background when this happened. I wasn't even interacting with it - I was in a meeting. I only noticed because my laptop fans were whurring when I got back. Restarting slack seemed to fix it for now. But that's not abnormal
Funny that this was written in 2016, and its even worse today. Even every note-taking app is now an electron app that runs an entire browser in there.