Q. Now, I know how to configure IPv6 tunnel but how do I browse website using IPv6 IP address like 2001:4860:0:2001::68 under Firefox or Opera web browser?
A. For command line or for browser IPv6 addresses need to be specified by enclosing addresses in square brackets like [2001:4860:0:2001::68].
I strongly recommend using DNS for resolving all IPv6 host names.