Auto-scroll is abrupt and jarring during rapid typing in Firefox

Phenomenon

When typing rapidly near the edges of a contenteditable element in Firefox, the automatic scrolling to keep the cursor visible is abrupt and jarring. The scroll happens suddenly rather than smoothly.

Reproduction example

1. Create a contenteditable element with scrollable content
2. Type text rapidly near the bottom edge
3. Observe scroll behavior

Observed behavior

• Scroll happens abruptly without smooth animation
• Multiple scroll jumps may occur during rapid typing
• User experience is jarring
• Scroll position may jump unexpectedly

Expected behavior

• Scroll should be smooth and gradual
• Scroll should happen predictably
• User experience should be pleasant
• Scroll should keep cursor visible without jarring

Browser Comparison

• Chrome/Edge: Generally smoother scrolling
• Firefox: More abrupt scrolling (this case)
• Safari: Scroll behavior varies

Notes and possible direction for workarounds

• Implement custom smooth scrolling
• Use scrollIntoView with smooth behavior
• Throttle scroll operations during rapid typing
• Use requestAnimationFrame for smooth scrolling