@burnout426 Edge and Firefox on Windows run their UIs at 240 fps on my 240 Hz monitor. Safari and Firefox on macOS also run at 144 fps when connected to an external 144 Hz monitor. Opera on macOS is also capped at 60 fps. I didn't test other browsers yet.
The vast majority of other applications also run at the native refresh rate. Electron apps lag, but these don't even run at 60 fps on a 60 Hz monitor. Chromium on its own doesn't lag as much as most Electron apps.