Novell Doc: Novell Access Manager 3.1 SP2 SSL VPN User Guide - Stability Issues when You Use a Firefox Browser on a Vista 64-Bit Machine

B.3 Stability Issues when You Use a Firefox Browser on a Vista 64-Bit Machine

If you are using a Windows Vista 64-bit machine and the Firefox browser to connect to SSL VPN, the connection might fail after running for a few hours, because of a Firefox browser stability issue. To work around this problem, make sure you upgrade to Firefox 3.0.10 or later.