<s>
Swiftfox	B-Protocol
was	O
a	O
web	B-Application
browser	I-Application
based	O
on	O
Mozilla	B-Application
Firefox	I-Application
.	O
</s>
<s>
It	O
was	O
available	O
for	O
Linux	B-Application
platforms	O
and	O
distributed	O
by	O
Jason	O
Halme	O
.	O
</s>
<s>
Swiftfox	B-Protocol
was	O
a	O
set	O
of	O
builds	O
of	O
Firefox	B-Application
optimized	O
for	O
different	O
Intel	O
and	O
AMD	O
microprocessors	B-Architecture
.	O
</s>
<s>
Swiftfox	B-Protocol
was	O
freely	O
downloadable	O
with	O
open	B-Application
source	I-Application
code	I-Application
and	O
proprietary	B-Application
binaries	O
.	O
</s>
<s>
Firefox	B-Application
extensions	B-Operating_System
and	O
plugins	B-Application
were	O
compatible	O
with	O
Swiftfox	B-Protocol
,	O
with	O
notable	O
exceptions	O
.	O
</s>
<s>
The	O
name	O
Swiftfox	B-Protocol
comes	O
from	O
the	O
animal	O
swift	O
fox	O
.	O
</s>
<s>
Swiftfox	B-Protocol
differs	O
from	O
Firefox	B-Application
by	O
a	O
limited	O
number	O
of	O
changes	O
,	O
and	O
builds	O
for	O
different	O
processors	O
.	O
</s>
<s>
Swiftfox	B-Protocol
was	O
discontinued	O
at	O
some	O
point	O
prior	O
to	O
April	O
2017	O
,	O
and	O
the	O
project	O
homepage	O
now	O
redirects	O
to	O
the	O
creator	O
's	O
private	O
Twitter	B-Application
account	I-Application
.	O
</s>
<s>
The	O
Swiftfox	B-Protocol
build	O
is	O
optimized	O
using	O
the	O
following	O
methods	O
:	O
</s>
<s>
Compiled	O
with	O
the	O
highest	O
level	O
of	O
compiler	B-Application
optimization	I-Application
,	O
rather	O
than	O
optimization	O
for	O
binary	O
size	O
.	O
</s>
<s>
The	O
resulting	O
Swiftfox	B-Protocol
binary	O
is	O
larger	O
than	O
Firefox	B-Application
.	O
</s>
<s>
Firefox	B-Application
is	O
compiled	O
-Os	O
.	O
</s>
<s>
Binaries	O
incorporate	O
additional	O
instruction	B-General_Concept
sets	I-General_Concept
.	O
</s>
<s>
Intel	O
and	O
AMD	O
:	O
MMX	B-Architecture
,	O
SSE	B-General_Concept
,	O
SSE2	B-General_Concept
,	O
(	O
not	O
generally	O
SSE3	B-General_Concept
)	O
.	O
</s>
<s>
AMD	O
only	O
:	O
3DNow	B-General_Concept
!	I-General_Concept
</s>
<s>
Optimization	O
specific	O
to	O
the	O
build	O
microprocessor	B-Architecture
architecture	O
.	O
</s>
<s>
Intel	O
:	O
Pentium	B-General_Concept
4	I-General_Concept
,	O
Pentium	B-General_Concept
3	I-General_Concept
,	O
Pentium	B-Architecture
M	I-Architecture
,	O
Pentium	B-General_Concept
III	I-General_Concept
,	O
Pentium	B-General_Concept
II	I-General_Concept
,	O
Pentium	B-General_Concept
4	I-General_Concept
(	O
Prescott	O
)	O
.	O
</s>
<s>
AMD64	B-Device
:	O
Athlon64	O
(	O
32bit	O
binary	O
)	O
.	O
</s>
<s>
AMD	O
:	O
Athlon	B-Architecture
XP	O
,	O
Athlon	B-Architecture
,	O
K6-2	O
.	O
</s>
<s>
Compiled	O
with	O
newer	O
version	O
of	O
GCC	B-Application
(	O
Firefox	B-Application
2.0	O
uses	O
3.3.2	O
,	O
Swiftfox	B-Protocol
2.0	O
uses	O
4.0.4	O
)	O
.	O
</s>
<s>
Better	O
protection	O
from	O
buffer	B-General_Concept
overflow	I-General_Concept
attacks	O
(	O
Swiftfox	B-Protocol
2.0	O
uses	O
-D_FORTIFY_SOURCE	O
=	O
2	O
;	O
Firefox	B-Application
2.0	O
uses	O
gcc	B-Application
3.x	O
,	O
which	O
does	O
not	O
support	O
this	O
)	O
.	O
</s>
<s>
Pango	B-Language
is	O
not	O
included	O
in	O
the	O
build	O
.	O
</s>
<s>
This	O
means	O
that	O
Unicode	O
fonts	O
remain	O
supported	O
(	O
see	O
Unicode	B-Language
and	I-Language
HTML	I-Language
)	O
,	O
but	O
without	O
certain	O
extra	O
features	O
provided	O
by	O
Pango	B-Language
.	O
</s>
<s>
IPv6	B-Protocol
DNS	B-Protocol
lookups	O
are	O
disabled	O
.	O
</s>
<s>
HTTP	B-Protocol
pipelining	I-Protocol
is	O
enabled	O
by	O
default	O
.	O
</s>
<s>
Fasterfox	O
provides	O
a	O
GUI	B-Application
to	O
adjust	O
these	O
settings	O
.	O
</s>
<s>
Swiftfox	B-Protocol
is	O
bundled	O
with	O
the	O
following	O
freely	O
available	O
Firefox	B-Application
plugins	B-Application
and	O
extensions	B-Operating_System
:	O
</s>
<s>
The	O
same	O
as	O
Firefox	B-Application
,	O
the	O
Swiftfox	B-Protocol
source	O
code	O
is	O
open-source	B-Application
,	O
with	O
the	O
source	O
code	O
under	O
MPL	B-License
1.1	I-License
except	O
for	O
parts	O
relating	O
to	O
branding	O
.	O
</s>
<s>
Unlike	O
Firefox	B-Application
,	O
the	O
Swiftfox	B-Protocol
binaries	O
have	O
a	O
proprietary	B-Application
license	I-Application
which	O
does	O
not	O
allow	O
redistribution	O
.	O
</s>
<s>
According	O
to	O
the	O
author	O
,	O
this	O
is	O
to	O
prevent	O
the	O
possibility	O
of	O
any	O
confusion	O
with	O
tainted	O
versions	O
(	O
see	O
the	O
Firefox	B-Application
branding	O
argument	O
Mozilla	B-Application
Firefox	I-Application
#Trademark	O
and	O
logo	O
)	O
.	O
</s>
<s>
The	O
name	O
Swiftfox	B-Protocol
is	O
trademarked	O
by	O
Jason	O
Halme	O
,	O
and	O
accordingly	O
cannot	O
be	O
used	O
on	O
other	O
third	O
party	O
Firefox	B-Application
builds	O
without	O
his	O
permission	O
.	O
</s>
<s>
Swiftfox	B-Protocol
binaries	O
are	O
available	O
as	O
Debian	O
packages	O
from	O
.	O
</s>
<s>
The	O
proprietary	B-Application
binary	O
license	O
prevents	O
Debian	O
and	O
other	O
Linux	B-Application
distributions	O
from	O
having	O
Swiftfox	B-Protocol
available	O
as	O
part	O
of	O
a	O
distribution	O
,	O
so	O
to	O
redistribute	O
Swiftfox	B-Protocol
one	O
would	O
have	O
to	O
change	O
the	O
name	O
and	O
icons	O
.	O
</s>
