The Google Cloud web interface is horribly slow for me in Firefox. For instance, while filtering logs, it can take a few seconds for my keystrokes to show up. This is the only website I've noticed performing poorly like this.
Visually ugly, poor performance, functionally buggy with no sign of support for an independent developer.
I know all of that is not Angular's fault but some of it sure is.
For anything other than logs, I just use the Lens desktop app.