I can't say for sure, but the things I would do are: Repair Permissions, run a cleaning utility like Coctail or MacJanitor, clear the Java 1.4.2 and 1.3.7 caches (search for "java settings") Oh, and you really should upgrade to 10.3.9 HTH Ron-- On Aug 28, 2005, at 5:23 PM, Jerry Bunn wrote: > Recently I have had trouble with Firefox not opening. It starts up > then just settles back into the dock. I tried repairing premissions, > restarting and downloading the newest version and still no luck.