The SmoothWheel extension will scroll the page smoothly with the mouse wheel. SmoothWheel utilizes several smart algorithms for smoothness and adaptive behaviour.
It can enhance/replace the internal Gecko smoothscroll (how to disable) which was introduced on 2003-03-24.
Here are some key features of "SmoothWheel":
· Can be disabled easily, even in Mozilla or Netscape.
· Automatically utilizes strong CPUs for smoother scroll.
· Very configurable, sane defaults.
· Scroll steps relative to scrollable area height (configurable).
· Advanced Optimized algorithm for a VERY smooth scroll in many scenarios.
· Soft-Edge : Lands gracefully on top/bottom of document.
· Adaptive-Step : Shorter duration between wheel events -> more pixels/event.
· Adaptive-Duration : Shorter duration between wheel events -> scrolls faster.
· Modifier keys for small/full page steps (SHIFT and ALT respectively by default).
· Timer based operation: Always 'finishes on time'.
· Allows to use the Up/Down keyboard arrows (disabled by default)
· Lets the default mouse wheel handler work if smoothwheel can't handle it.
Requirements:
· Firefox 0.3 to 3.7a1pre
What's New in This Release: [ read full changelog ]
· New: Icon
· Improve: better response to modifiers while scrolling
· Improve: Slightly wider range of steps selection
· Compatibility: Firefox trunk (3.6+)
Universal Binary 
