<s>
NetSurf	B-Application
is	O
an	O
open-source	B-Application
web	B-Application
browser	I-Application
which	O
uses	O
its	O
own	O
layout	B-Protocol
engine	I-Protocol
.	O
</s>
<s>
NetSurf	B-Application
provides	O
features	O
including	O
tabbed	O
browsing	O
,	O
bookmarks	O
and	O
page	O
thumbnailing	O
.	O
</s>
<s>
The	O
NetSurf	B-Application
project	O
was	O
started	O
in	O
April	O
2002	O
in	O
response	O
to	O
a	O
discussion	O
of	O
the	O
deficiencies	O
of	O
the	O
RISC	B-Operating_System
OS	I-Operating_System
platform	O
's	O
existing	O
web	B-Application
browsers	I-Application
.	O
</s>
<s>
Shortly	O
after	O
the	O
project	O
's	O
inception	O
,	O
development	O
versions	O
for	O
RISC	B-Operating_System
OS	I-Operating_System
users	O
were	O
made	O
available	O
for	O
download	O
by	O
the	O
project	O
's	O
automated	B-Application
build	I-Application
system	I-Application
.	O
</s>
<s>
NetSurf	B-Application
was	O
voted	O
"	O
Best	O
non-commercial	O
software	O
"	O
four	O
times	O
in	O
Drobe	B-Device
Launchpad	I-Device
's	O
annual	O
RISC	B-Operating_System
OS	I-Operating_System
awards	O
between	O
2004	O
and	O
2008	O
.	O
</s>
<s>
NetSurf	B-Application
supports	O
both	O
mainstream	O
systems	O
(	O
e.g.	O
</s>
<s>
macOS	B-Operating_System
and	O
Unix-like	B-Operating_System
)	O
and	O
older	O
or	O
uncommon	O
platforms	O
(	O
e.g.	O
</s>
<s>
AmigaOS	B-Application
,	O
Haiku	B-Language
,	O
Atari	B-Application
TOS	I-Application
,	I-Application
RISC	B-Operating_System
OS	I-Operating_System
,	O
and	O
Redox	B-Operating_System
)	O
.	O
</s>
<s>
The	O
browser	B-Application
was	O
ranked	O
in	O
2011	O
as	O
in	O
an	O
article	O
highlighting	O
10	O
browsers	B-Application
for	O
Linux	B-Application
published	O
in	O
TechRepublic	O
and	O
ZDNet	O
.	O
</s>
<s>
In	O
2010	O
it	O
was	O
referred	O
to	O
as	O
a	O
CLI	O
browser	B-Application
superior	O
to	O
w3m	B-Application
.	O
</s>
<s>
NetSurf	B-Application
's	O
multi-platform	O
core	O
is	O
written	O
in	O
ANSI	O
C	O
,	O
and	O
implements	O
most	O
of	O
the	O
HTML	B-Language
4	I-Language
and	O
CSS	B-Language
2.1	I-Language
specifications	O
using	O
its	O
own	O
bespoke	O
layout	B-Protocol
engine	I-Protocol
.	O
</s>
<s>
As	O
of	O
version	O
2.0	O
,	O
NetSurf	B-Application
uses	O
Hubbub	O
,	O
an	O
HTML	B-Language
parser	O
that	O
follows	O
the	O
HTML5	B-Application
specification	O
.	O
</s>
<s>
As	O
well	O
as	O
rendering	O
GIF	O
,	O
JPEG	O
,	O
PNG	O
and	O
BMP	B-Device
images	I-Device
,	O
the	O
browser	B-Application
also	O
supports	O
formats	O
native	O
to	O
RISC	B-Operating_System
OS	I-Operating_System
,	O
including	O
Sprite	O
,	O
Draw	O
and	O
ArtWorks	B-Device
files	O
.	O
</s>
<s>
It	O
was	O
suggested	O
by	O
developer	O
John-Mark	B-Application
Bell	I-Application
in	O
2007	O
that	O
support	O
for	O
JavaScript	B-Language
could	O
be	O
added	O
.	O
</s>
<s>
This	O
feature	O
did	O
not	O
make	O
it	O
into	O
NetSurf	B-Application
v2	O
back	O
in	O
2008	O
,	O
nor	O
into	O
NetSurf	B-Application
v3	O
of	O
2013	O
,	O
but	O
as	O
of	O
December	O
2012	O
there	O
are	O
some	O
NetSurf	B-Application
preview-builds	O
available	O
which	O
contain	O
early-stage	O
JavaScript	B-Language
support	O
(	O
later	O
much	O
improved	O
)	O
.	O
</s>
<s>
On	O
April	O
20	O
,	O
2013	O
,	O
NetSurf	B-Application
3.0	O
was	O
released	O
.	O
</s>
<s>
NetSurf	B-Application
began	O
in	O
April	O
2002	O
as	O
a	O
web	B-Application
browser	I-Application
for	O
the	O
RISC	B-Operating_System
OS	I-Operating_System
platform	O
.	O
</s>
<s>
Work	O
on	O
a	O
GTK	B-Application
port	O
began	O
in	O
June	O
2004	O
to	O
aid	O
development	O
and	O
debugging	O
.	O
</s>
<s>
It	O
has	O
since	O
gained	O
many	O
of	O
the	O
user	O
interface	O
features	O
present	O
in	O
the	O
RISC	B-Operating_System
OS	I-Operating_System
version	O
.	O
</s>
<s>
The	O
browser	B-Application
is	O
packaged	O
with	O
several	O
distributions	O
including	O
Ubuntu	B-Operating_System
,	O
NetBSD	B-Device
,	O
and	O
OpenBSD	B-Operating_System
.	O
</s>
<s>
After	O
five	O
years	O
of	O
development	O
,	O
the	O
first	O
stable	O
version	O
of	O
the	O
browser	B-Application
was	O
released	O
on	O
19	O
May	O
2007	O
to	O
coincide	O
with	O
the	O
Wakefield	O
RISC	B-Operating_System
OS	I-Operating_System
show	O
.	O
</s>
<s>
After	O
the	O
release	O
of	O
NetSurf	B-Application
1.0	O
there	O
were	O
two	O
point-releases	O
,	O
which	O
largely	O
comprised	O
bug	O
fixes	O
.	O
</s>
<s>
NetSurf	B-Application
1.1	O
was	O
released	O
in	O
August	O
2007	O
and	O
in	O
March	O
2008	O
the	O
NetSurf	B-Application
1.2	O
release	O
was	O
made	O
available	O
.	O
</s>
<s>
NetSurf	B-Application
participated	O
in	O
Google	B-Application
Summer	I-Application
of	I-Application
Code	I-Application
in	O
2008	O
as	O
a	O
mentoring	O
organisation	O
,	O
running	O
four	O
projects	O
.	O
</s>
<s>
These	O
included	O
improving	O
the	O
GTK	B-Application
front	O
end	O
,	O
adding	O
paginated	O
PDF	O
export	O
support	O
and	O
developing	O
the	O
project	O
's	O
HTML	B-Application
5	I-Application
compliant	O
parsing	O
library	O
,	O
Hubbub	O
.	O
</s>
<s>
All	O
NetSurf	B-Application
development	O
builds	O
since	O
11	O
August	O
2008	O
have	O
used	O
Hubbub	O
to	O
parse	O
HTML	B-Language
and	O
it	O
is	O
available	O
for	O
use	O
in	O
other	O
projects	O
under	O
the	B-License
MIT	I-License
license	I-License
.	O
</s>
<s>
NetSurf	B-Application
was	O
again	O
accepted	O
as	O
a	O
mentoring	O
organisation	O
into	O
Google	B-Application
Summer	I-Application
of	I-Application
Code	I-Application
2009	O
.	O
</s>
<s>
The	O
projects	O
they	O
ran	O
included	O
development	O
of	O
LibDOM	O
,	O
the	O
project	O
's	O
Document	B-General_Concept
Object	I-General_Concept
Model	I-General_Concept
,	O
and	O
improvement	O
of	O
NetSurf	B-Application
's	O
user	O
interface	O
.	O
</s>
<s>
The	O
interface	O
work	O
included	O
moving	O
previously	O
RISC	O
OS-only	O
functionality	O
to	O
the	O
multi-platform	O
core	O
,	O
including	O
bookmarks	O
,	O
global	O
history	O
,	O
cookie	B-Application
management	O
and	O
page	O
search	O
features	O
.	O
</s>
<s>
A	O
port	O
to	O
the	O
Windows	B-Application
operating	I-Application
system	I-Application
was	O
also	O
started	O
.	O
</s>
<s>
In	O
2010	O
the	O
NetSurf	B-Application
project	O
did	O
not	O
apply	O
to	O
participate	O
in	O
Google	B-Application
Summer	I-Application
of	I-Application
Code	I-Application
due	O
to	O
the	O
developers	O
having	O
other	O
commitments	O
.	O
</s>
<s>
NetSurf	B-Application
2.0	O
was	O
released	O
in	O
April	O
2009	O
for	O
RISC	B-Operating_System
OS	I-Operating_System
,	O
Linux	B-Application
and	O
other	O
Unix-like	B-Operating_System
platforms	O
,	O
BeOS	B-Application
,	O
Haiku	B-Language
,	O
and	O
AmigaOS	B-Application
4	I-Application
.	O
</s>
<s>
This	O
was	O
the	O
first	O
version	O
to	O
use	O
the	O
project	O
's	O
HTML5	B-Application
parsing	O
library	O
,	O
Hubbub	O
.	O
</s>
<s>
In	O
May	O
2009	O
a	O
maintenance	O
release	O
,	O
NetSurf	B-Application
2.1	O
,	O
was	O
issued	O
to	O
users	O
.	O
</s>
<s>
NetSurf	B-Application
2.5	O
was	O
released	O
in	O
April	O
2010	O
.	O
</s>
<s>
This	O
was	O
the	O
first	O
release	O
to	O
use	O
the	O
project	O
's	O
library	O
for	O
CSS	B-Language
parsing	O
and	O
selection	O
,	O
LibCSS	O
and	O
a	O
new	O
internal	O
cache	O
for	O
fetched	O
content	O
.	O
</s>
<s>
September	O
2010	O
saw	O
the	O
release	O
of	O
NetSurf	B-Application
2.6	O
,	O
which	O
included	O
a	O
number	O
of	O
fixes	O
and	O
improvements	O
.	O
</s>
<s>
NetSurf	B-Application
2.7	O
was	O
released	O
in	O
April	O
2011	O
,	O
and	O
added	O
treeview	O
support	O
for	O
features	O
including	O
bookmarking	O
(	O
called	O
the	O
Hotlist	O
manager	O
in	O
NetSurf	B-Application
)	O
,	O
history	O
management	O
,	O
and	O
cookie	B-Application
management	O
.	O
</s>
<s>
It	O
was	O
also	O
the	O
first	O
version	O
to	O
be	O
released	O
for	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
.	O
</s>
<s>
In	O
September	O
2011	O
NetSurf	B-Application
2.8	O
was	O
released	O
.	O
</s>
<s>
It	O
added	O
support	O
for	O
frames	B-General_Concept
and	O
iframes	O
in	O
the	O
browser	B-Application
's	O
core	O
rendering	O
engine	O
,	O
making	O
them	O
available	O
to	O
all	O
front	O
ends	O
.	O
</s>
<s>
In	O
April	O
2012	O
NetSurf	B-Application
2.9	O
was	O
released	O
.	O
</s>
<s>
The	O
most	O
significant	O
changes	O
were	O
new	O
multi-tasking	O
behaviour	O
,	O
optimised	O
URL	O
handling	O
,	O
fetcher	O
optimisations	O
,	O
cache	O
optimisations	O
,	O
and	O
faster	O
CSS	B-Language
selection	O
.	O
</s>
<s>
In	O
April	O
2013	O
NetSurf	B-Application
3.0	O
was	O
released	O
.	O
</s>
<s>
The	O
biggest	O
difference	O
was	O
the	O
use	O
of	O
the	O
new	O
Document	B-General_Concept
Object	I-General_Concept
Model	I-General_Concept
library	O
,	O
LibDOM	O
.	O
</s>
<s>
This	O
new	O
library	O
is	O
a	O
foundation	O
that	O
paves	O
the	O
way	O
for	O
NetSurf	B-Application
developers	O
to	O
implement	O
a	O
fully	O
dynamic	O
layout	B-Protocol
engine	I-Protocol
in	O
the	O
future	O
.	O
</s>
<s>
Other	O
improvements	O
in	O
NetSurf	B-Application
3.0	O
include	O
completely	O
new	O
textarea	O
support	O
,	O
ability	O
to	O
fetch	O
and	O
parse	O
CSS	B-Language
in	O
parallel	O
with	O
HTML	B-Language
documents	O
,	O
extensive	O
behind-the-scenes	O
refactoring	O
,	O
and	O
a	O
host	O
of	O
smaller	O
changes	O
and	O
fixes	O
.	O
</s>
<s>
In	O
April	O
2014	O
NetSurf	B-Application
3.1	O
was	O
released	O
,	O
containing	O
many	O
improvements	O
over	O
the	O
previous	O
release	O
.	O
</s>
<s>
The	O
highlights	O
include	O
much	O
faster	O
CSS	B-Language
selection	O
performance	O
,	O
faster	O
start	O
up	O
time	O
,	O
new	O
look	O
and	O
feel	O
to	O
the	O
treeviews	O
(	O
hotlist/bookmarks	O
,	O
global	O
history	O
and	O
cookie	B-Application
manager	O
)	O
,	O
improved	O
options	O
handling	O
,	O
undo/redo	O
support	O
in	O
textareas	O
,	O
and	O
general	O
improvement	O
of	O
forms	O
.	O
</s>
<s>
In	O
July	O
2019	O
NetSurf	B-Application
3.9	O
was	O
released	O
,	O
with	O
support	O
for	O
CSS	B-Language
Media	O
Queries	O
(	O
level	O
4	O
)	O
and	O
improvements	O
to	O
JavaScript	B-Language
handling	O
.	O
</s>
<s>
A	O
native	O
BeOS/Haiku	O
port	O
has	O
been	O
developed	O
.	O
</s>
<s>
Since	O
the	O
GTK	B-Application
version	O
was	O
built	O
for	O
AmigaOS	B-Application
,	O
using	O
Cygnix	O
which	O
provides	O
an	O
X11	B-Operating_System
environment	O
,	O
a	O
native	O
AmigaOS	B-Application
port	O
has	O
also	O
been	O
developed	O
.	O
</s>
<s>
In	O
January	O
2009	O
,	O
NetSurf	B-Application
was	O
made	O
available	O
on	O
MorphOS	B-Operating_System
,	O
an	O
operating	O
system	O
that	O
is	O
API-compatible	O
with	O
AmigaOS	B-Application
.	O
</s>
<s>
A	O
Windows	B-Application
port	O
is	O
also	O
available	O
for	O
download	O
.	O
</s>
<s>
A	O
framebuffer	B-Algorithm
port	O
was	O
created	O
in	O
September	O
2008	O
.	O
</s>
<s>
The	O
framebuffer	B-Algorithm
frontend	O
has	O
been	O
used	O
to	O
create	O
a	O
web	O
kiosk	O
on	O
embedded	O
systems	O
.	O
</s>
<s>
The	O
Plan	B-Operating_System
9	I-Operating_System
port	O
is	O
also	O
based	O
on	O
it	O
.	O
</s>
<s>
In	O
January	O
2010	O
,	O
the	O
NetSurf	B-Application
Developers	O
announced	O
the	O
release	O
of	O
what	O
they	O
expected	O
at	O
the	O
time	O
to	O
be	O
the	O
last	O
release	O
for	O
RISC	B-Operating_System
OS	I-Operating_System
.	O
</s>
<s>
Lead	O
developer	O
John-Mark	B-Application
Bell	I-Application
said	O
at	O
the	O
time	O
"	O
Realistically	O
,	O
the	O
people	O
qualified	O
to	O
maintain	O
the	O
RISC	B-Operating_System
OS	I-Operating_System
port	O
are	O
up	O
to	O
their	O
necks	O
in	O
other	O
stuff.	O
"	O
</s>
<s>
January	O
2011	O
saw	O
the	O
announcement	O
of	O
a	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
port	O
.	O
</s>
<s>
visurf	O
is	O
a	O
fork	B-Application
of	O
NetSurf	B-Application
led	O
by	O
Drew	O
DeVault	O
.	O
</s>
<s>
It	O
has	O
vi-inspired	O
key	O
bindings	O
and	O
Wayland-only	O
UI	O
.	O
</s>
