Since the FireFox is 3X version , I find the FireFox can NOT automatically update the new version when it tell me to reload the firefox itself for applying the new version. But the firefox window can NOT appear again after I reload it . The firefox process is still be in the background. I have to terminate the firefox process then start the firefox, but the version is still old . I try to start the firefox by safe mode without any plug-in then update the new version ,but it is failed as same as before. Now I have to download the install package to updated firefox manually everytime, It dose work ,but it is very Bad User Experience, you know!