Firefox ^[1] 3.1 is pretty fast due to a new JavaScript engine called TraceMonkey being used, however many user would still encounter slowness while using Firefox 3.1, since TraceMonkey is not enabled by default.

In order to start using TraceMonkey you will need to enable it, which once again is not straightforward. Here are some simple steps to enable TraceMonkey in Firefox 3.1.

Step 1: Type about:config in the address bar

Step 2: If this is first time you are editing the configuration, agree to the to be careful dialog box. 

Step 3: In the filter field type: javascript.options.jit.content

Step 4: Change the boolean value from false to true by double clicking on it

Step 5: Restart your Firefox.

That’s it, enjoy a much more faster browsing with your Firefox after you have enabled TraceMonkey. Thanks for the tip Tim ^[2].