TraceMonkey is the magic pill that makes the new Firefox much quicker. Unfortunately, the beta version has this feature disabled. By changing the value of a couple of configuration settings, you can easily enable TraceMonkey and enjoy its speedy goodness.
1. Open Firefox.
2. In the Location Bar, input about:config.
3. Click to get past the warning message that appears.
4. Locate the Preference Name javascript.options.jit.chrome.
5. Double-click the preference and change the value to true.
6. Locate the Preference Name javascript.options.jit.content.
7. Double-click the preference and change the value to true.
