Unfortunately this is bad news for all users and fans of the popular browser Mozilla, Firefox, according to the foundation, the final version of Firefox 4 will not see light until next year.
Although there are several versions available for beta testing and are relatively stable, Mozilla developers have decided to take the time to take it easy to leave no stone unturned.
The bearer of this message was the director of Firefox Mike Beltzner, who in a group of developers from Google said that "complete this work is taking more than initial estimates suggested, as we seek the regressions, and sources of instability."
