Thanks! Please check your inbox to confirm your subscription. If you haven’t previously confirmed a subscription to a Mozilla-related newsletter you may have to do so. Please check your inbox or your spam filter for an email from us. jpvincent so, will this engine be only in FF4 or it could happen sooner in a 3.6.x version ? May 11th, 2010 at 09:23 jng You can in 3.6.x, but you have to go to about