<s>
xB	B-Application
Browser	I-Application
(	O
formerly	O
known	O
as	O
TorPark	B-Application
and	O
Xerobank	B-Application
browser	I-Application
)	O
was	O
a	O
web	B-Application
browser	I-Application
designed	O
to	O
run	O
on	O
both	O
the	O
Tor	B-Application
and	O
XeroBank	B-Application
anonymity	B-Application
networks	I-Application
,	O
and	O
is	O
available	O
as	O
component	O
of	O
the	O
xB	O
Machine	O
and	O
the	O
xB	O
Installer	O
.	O
</s>
<s>
It	O
is	O
designed	O
for	O
use	O
on	O
portable	B-Device
media	I-Device
such	O
as	O
a	O
USB	O
flash	O
drive	O
,	O
but	O
it	O
can	O
also	O
be	O
used	O
on	O
any	O
hard	B-Device
disk	I-Device
drive	I-Device
.	O
</s>
<s>
As	O
such	O
,	O
a	O
secure	O
and	O
encrypted	O
connection	O
to	O
any	O
of	O
the	O
Tor	B-Application
or	O
XeroBank	B-Application
routers	B-Protocol
can	O
be	O
created	O
from	O
any	O
computer	O
with	O
a	O
suitable	O
Internet	O
connection	O
,	O
and	O
the	O
browser	B-Application
clears	O
all	O
data	O
that	O
was	O
created	O
on	O
the	O
portable	O
drive	O
upon	O
exit	O
or	O
on	O
demand	O
.	O
</s>
<s>
In	O
March	O
2007	O
it	O
was	O
reported	O
that	O
the	O
xB	B-Application
Browser	I-Application
was	O
downloaded	O
4	O
million	O
times	O
and	O
in	O
February	O
2008	O
over	O
6.5	O
million	O
downloads	O
making	O
xB	B-Application
Browser	I-Application
the	O
most	O
popular	O
anonymous	O
browser	B-Application
on	O
the	O
Internet	O
.	O
</s>
<s>
Steve	O
Topletz	O
co-released	O
Torpark	B-Application
v.1.5.0.7	O
with	O
CULT	O
OF	O
THE	O
DEAD	O
COW/Hacktivismo	O
on	O
19	O
September	O
2006	O
after	O
more	O
than	O
one	O
year	O
of	O
development	O
based	O
on	O
Portable	B-Operating_System
Firefox	I-Operating_System
web	B-Application
browser	I-Application
with	O
built	O
in	O
support	O
for	O
Tor	B-Application
and	O
using	O
the	O
Nullsoft	B-Language
Scriptable	I-Language
Install	I-Language
System	I-Language
.	O
</s>
<s>
A	O
cross-compatible	O
version	O
for	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
and	O
Linux	B-Application
was	O
being	O
developed	O
based	O
on	O
xB	O
Machine	O
,	O
due	O
to	O
be	O
available	O
in	O
August	O
2008	O
,	O
but	O
the	O
development	O
seems	O
now	O
abandoned	O
.	O
</s>
<s>
xB	B-Application
Browser	I-Application
routes	O
Internet	O
traffic	O
through	O
several	O
onion	B-Protocol
servers	I-Protocol
,	O
obscuring	O
the	O
originating	O
IP	B-Protocol
address	O
and	O
encrypting	O
the	O
data	O
.	O
</s>
<s>
Other	O
applications	O
such	O
as	O
Pidgin	B-Protocol
can	O
be	O
routed	O
through	O
the	O
Tor	B-Application
network	I-Application
via	O
xB	B-Application
Browser	I-Application
by	O
directing	O
the	O
applications	O
 '	O
traffic	O
to	O
a	O
SOCKS	B-Application
proxy	I-Application
at	O
localhost	B-Protocol
,	O
port	B-Protocol
9050	O
.	O
</s>
<s>
This	O
port	B-Protocol
can	O
be	O
changed	O
via	O
xB	O
Config	O
,	O
an	O
INI	O
generator	O
for	O
xB	B-Application
Browser	I-Application
.	O
</s>
<s>
xB	B-Application
Browser	I-Application
is	O
optimized	O
for	O
use	O
on	O
the	O
XeroBank	B-Application
anonymity	B-Application
network	I-Application
,	O
which	O
is	O
a	O
private	O
and	O
commercial	O
broadband	B-General_Concept
network	O
operated	O
by	O
Xero	O
Networks	O
AG	O
.	O
</s>
<s>
The	O
XeroBank	B-Application
network	O
routes	O
traffic	O
through	O
at	O
least	O
two	O
multi-jurisdictional	O
hops	O
.	O
</s>
<s>
In	O
contrast	O
to	O
Tor	B-Application
,	O
the	O
XeroBank	B-Application
network	O
supports	O
both	O
TCP	B-Protocol
and	O
UDP	B-Protocol
protocols	I-Protocol
,	O
performs	O
channel	O
multiplexing	B-Architecture
for	O
low	O
observability	O
,	O
is	O
run	O
by	O
a	O
single	O
entity	O
and	O
costs	O
money	O
to	O
use	O
.	O
</s>
<s>
The	O
XeroBank	B-Application
network	O
is	O
accessible	O
via	O
SSH	B-Protocol
and	O
OpenVPN	B-Language
protocols	O
.	O
</s>
<s>
xB	B-Application
Browser	I-Application
internally	O
manages	O
a	O
SSH	B-Protocol
connection	O
to	O
XeroBank	B-Application
,	O
but	O
will	O
recognize	O
and	O
submit	O
to	O
OpenVPN	B-Language
connections	O
.	O
</s>
<s>
Besides	O
the	O
anonymous	O
networks	O
,	O
xB	B-Application
Browser	I-Application
uses	O
following	O
add-ons	B-Operating_System
:	O
</s>
<s>
Adblock	B-Application
Plus	I-Application
,	O
</s>
<s>
Cookies	B-Application
and	O
Flash	B-Operating_System
cookies	I-Operating_System
removal	O
,	O
</s>
