Drop a file inside /etc/modprobe.d with the line
install ipv6 /bin/true
Then check. This disables IPv6.
How can one be sure that it is an issue with IPv6? Also, will this hack not
affect other applications/services?
Still using FF 3.0, dude FF 3.5 is out, switch to it, it is awesome.
It uses html 5 and some really cool features.
FF3.5 doesn't use HTML 5, it supports the standard. Yes it does render JS
remarkably faster due to optimizations in the JS VM.