I'd prefer one Firefox tab in a standalone window (for example: Slack) instead of booting an instance of a different browser. Granted, I could always have that

I'd prefer one Firefox tab in a standalone window (for example: Slack) instead of booting an instance of a different browser. Granted, I could always have that tab in a separate window, but that groups it with other Firefox windows, making it harder to navigate to when compared to PWA.