TypeScript

I don't use the performance tools on Dev Tools, but if I'm working on DevTools, I use DevTools on DevTools all the time. So yeah, that can get very confusing because you've got two DevTools windows open at all times. The trick most of us use is to set one DevTools to light mode and one to dark mode. And then you can visually distinguish which is which. It can get a little bit trippy at times. But yeah, it is entirely a front and base applications, all HTML, CSS and JavaScript for us TypeScript-based. We use it all the time on itself.