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Here's a little restartless Firefox addon that tells you if the page is loaded over IPv6: https://addons.mozilla.org/en-US/firefox/addon/sixornot/ and one for Chrome (written by p1mrx here): https://chrome.google.com/webstore/detail/ecanpcehffngcegjma...


Actually, IPvFOX (https://addons.mozilla.org/en-US/firefox/addon/ipvfox/) is even better. Sixornot only shows dns lookups for the page's domain, this one shows IP address for every loaded resource in it.


If you click SixOrNot's down-arrow, it shows the same information, right?


Not really, at least according to description text of IPvFOX addon. And I remember that sixornot's verdict over a loaded page hasn't always been correct in the past - lot of sites have v6 DNS entries, but aren't really connectable, etc.


Ah... yeah, okay, I really should update that. SixOrNot used to be DNS only, but now it monitors connections too.

There's also 4or6, which has easy access to the IPv6-related preferences.




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