The Fastest Firefox Yet
Things move quickly online, and we’ve beefed up the engine that runs Firefox to make sure you can keep up: Firefox 3.5 is more than twice as fast as Firefox 3, and ten times as fast as Firefox 2.* As a result, Web applications like email, photo sites and your favorite social networks will feel snappier and more responsive.
Performance
Faster JavaScript
The TraceMonkey JavaScript engine brings screaming fast performance to Firefox 3.5. With JavaScript that's more than twice as fast as Firefox 3 and 10x faster than Firefox 2, you’ll be able to see the difference without breaking out your stopwatch.