Yes, Tor plugin in Icecat 63 not works properly. I reported it to a developer 
through his website.

There is one important thing that Tor plugin breaks. If you look at 
https://wiki.gentoo.org/wiki/Tor#Firefox 
<https://wiki.gentoo.org/wiki/Tor#Firefox> there are lines you should configure 
in about:config page in Icecat
network.proxy.socks_remote_dns    truenetwork.dns.disablePrefetch       
truenetwork.dns.disableIPv6           true
So plugin resets  'network.proxy.socks_remote_dns' to 'false' every time it 
runs and every time you start Icecat having tor plugin is activated. And this 
is why ISP performs dns requests. 



Jan 7, 2019, 2:02 AM by m...@gnu.org:

> On Sun, Jan 06, 2019 at 15:09:51 -0500, Joshua Branson wrote:
>
>> Now, when you start icecat, you may have to click on the tor plugin to
>> activate it, but it normally autostarts for me.
>>
>> Also, at least for me, that doesn't configure my browser to access tor
>> hidden services.  But it does run all of your http traffic through the
>> tor network, which is pretty cool.
>>
>
> That's concerning to me: it seems to imply that DNS requests are _not_
> being proxied through Tor, which could leak very sensitive information
> to your ISP and other parties.
>
> I use FoxyProxy Standard[0] (just by habit over the many years I've used
> Tor with Firefox), so I hadn't tried the Addon distributed with
> Icecat.  FoxyProxy has an option to proxy DNS requests through Tor (and
> does so by default IIRC).
>
> [0]: > https://directory.fsf.org/wiki/FoxyProxy_Standard 
> <https://directory.fsf.org/wiki/FoxyProxy_Standard>
>
> -- 
> Mike Gerwitz
> Free Software Hacker+Activist | GNU Maintainer & Volunteer
> GPG: D6E9 B930 028A 6C38 F43B  2388 FEF6 3574 5E6F 6D05
> https://mikegerwitz.com <https://mikegerwitz.com>
>

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