Apparently it's a Firefox add-on that improves speed and page loading time. Is it worth the download?
of course it is worth...I am using those since a year and satisfied with performance...some times firefox crashes due to sme ad-ons..but their updated versions are frequently launched...also while firefox dsnt go well with any ad-on, u ve got the option to run it on "safemode" through list of programs in start menu
IMHO, Page loading for Google or any other website, depends on the hosting server and load of traffic Add-Ons or different browser might speed the things up a little bit but it's all about traffic.