The performance of Google apps in Firefox (and any non-Chrome browser) have always been sluggish. But since I updated to Quantum its been much smoother for me.

The performance of Google apps in Firefox (and any non-Chrome browser) have always been sluggish. But since I updated to Quantum its been much smoother for me. Also don't think the mobile (iOS/Android) versions of Firefox have seen the Quantum updates yet. Note: I'm on Linux