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[tor-talk] Firefox with Tor on Android?
Hi there,
the usage instructions for Tor on Android at
https://www.torproject.org/docs/android.html.en
are unsafe for Firefox users.
Firefox on Android downloads favicons without respecting proxy
preferences. See here:
https://bugzilla.mozilla.org/show_bug.cgi?id=507641#c12
Hence, manual proxy configuration of Firefox (via about:config or
add-ons such as Proxy Mobile) fails to tunnel browser traffic
through Tor: The bulk of the traffic goes through Tor but Android
issues GET requests for favicons with the real IP address.
(I tried different configurations of Orbot and Firefox. Also âTor
Everythingâ fails, both with HTTP proxy at port 8118 and SOCKS proxy
at 9050.)
As a side remark: The favicon code seems to cache the image. So, if
you aim to reproduce this issue and try to capture unanonymized GET
requests on the wire, be sure to visit web pages from previously
unseen domains. E.g., different languages of wikipedia.org such as
http://als.wikipedia.org/ might be suitable.
My current attempt for Firefox with Orbot is to configure localhost,
port 8118 as system HTTP proxy (long press Wi-Fi connection ->
Modify network -> Show advances options). Then, in Firefox verify
via about:config that network.proxy.type is set to 5, which should
be the default and lets Firefox use the system proxy, which is also
used to fetch favicons.
Probably, there are more pitfalls. Any suggestions?
Best wishes
Jens
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