If something doesn't work in an up to date Firefox then it just doesn't work.

Same if it doesn't work in Edge (or Chrome for that matter.)

I refuse to run Chrome when I can avoid it (not even installed on the majority of my machines.)

In Firefox (or standalone) Slack eats CPU when someone uses animated emojis in a thread you have open.

Maybe it works in Chrome but I guess not and I'm not gonna install Chrome for that or even for testing it.

When the standalone app doesn't work properly && the web app doesn't work properly in all major browsers it is broken.

I do this (I have it as a pinned tab next to Inbox) and love it.

Much more resource efficient, faster to close/open, and easier to have (gasp) a tabbed browsing experience to keep an eye on an important channel.

I run Slack in a Chrome tab but have started experiencing issues where that tab grinds to a halt doing simple Slack things (like switching channels) and the tab eventually crashes.

Electron is chromium...