[Bug 573404] Re: Firefox is unable to download add-ons (download error -228)

[HabsFanInOz]

Disabling IPv6 in Firefox via about:config didn't work for me either,
but carrying out the modifications to /etc/sysctl.conf described above
DID work.  Thank you!

Can anyone explain what this does and why it works?

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Firefox is unable to download add-ons (download error -228)
https://bugs.launchpad.net/bugs/573404
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