I downloaded and installed the nightly Mozilla 0.9.3 build (31Aug01). Every time I exit (or close) Mozilla, I always experience a crash. Other than that problem so far Mozilla 0.9.3 has been running fine. Although I just installed it tonight, I have to do more testing to see how stable this nightly build is. Does the Save Form Data option work in Mozilla 0.9.3 nightly build 31Aug01 in the Navigator component?
