On a recent vacation I had no problem using Firefox USB (U3)on standalone PCs but it would crash when trying to use networked PCs running Windows 2000 at internet cafes. At one location the owner disabled something in Windows and, after re-booting the computer, Firefox was OK. Was this simply a security/firewall problem?
Moved to the U3 Apps forum by moderator JTH. Firefox Portable is the open and free version that runs from all drives.