Steps to reproduce:
Larger downloads (like the raspberry pi disk image I'm downloading, 3gb) causes noticeable slowdown on Orion, navigating between tabs, refreshing pages, clicking the downloads tab, etc. all stutter.
Ideally, downloads wouldn't cause the browser to stutter
Orion and macOS:
Orion 0.99.108.1-beta and macOS 12.0.1