It works! Fun to see which websites support IPv6 and which don't.

This is the best and most unobtrusive IPv6 indicator for Firefox. I especially like that it's completely open source.

Not only shows IPv6 connectivity, but lists apis and called web modules on the site. Very useful for evaluating IPv6 content and content providing.

Works great - thanks! :)

Very simple, but it is good to check IPv6/IPv4 connection.