Enabling IPv6 on Mozilla Firefox 4?

December 2016

By default IPv6 is disabled on Firefox 4, to enable it:
  • Open Firefox
  • In the address bar, type "about:config" and press Enter
  • Click on "I'll be careful, I promise. "
  • In the search bar, type "ipv6" to locate the following entry "network.dns.disableIPv6".
  • Set it's value to "True"
  • Restart Firefox for changes to take effect.

Related :

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