vishwaswish
Disciple
The first Firefox 3.1 beta has been made available for DOWNLOAD, bringing with it a number of cool new features. However, possibly the coolest of those features, the lightning-fast TraceMonkey JavaScript engine, is disabled by default. Fortunately, it’s a quick fix to turn it on, and Seth Rosenblatt at CNET explains how
To activate it, type "about:config" into the Smart Bar, then type "javascript.options.jit.content" into the filter. Double-click on the preference listed to change the boolean setting from "false" to "true." Close the window and you should notice an immediate improvement to the JavaScript rendering speed.