<s>
OmniWeb	B-Protocol
is	O
a	O
discontinued	O
web	B-Application
browser	I-Application
that	O
was	O
developed	O
and	O
marketed	O
by	O
The	O
Omni	O
Group	O
exclusively	O
for	O
Apple	O
's	O
macOS	B-Application
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
Though	O
a	O
stable	O
version	O
is	O
no	O
longer	O
maintained	O
,	O
it	O
is	O
still	O
available	O
as	O
a	O
free	B-License
download	I-License
and	O
unstable	O
versions	O
are	O
still	O
being	O
released	O
.	O
</s>
<s>
OmniWeb	B-Protocol
was	O
originally	O
developed	O
by	O
Omni	O
Group	O
for	O
the	O
NeXTSTEP	B-Application
platform	O
,	O
and	O
was	O
released	O
by	O
Lighthouse	O
Design	O
on	O
March	O
17	O
,	O
1995	O
after	O
only	O
one	O
month	O
's	O
development	O
time	O
.	O
</s>
<s>
As	O
NeXTSTEP	B-Application
evolved	O
into	O
OPENSTEP	B-Operating_System
and	O
then	O
Mac	B-Application
OS	I-Application
X	O
,	O
OmniWeb	B-Protocol
was	O
updated	O
to	O
run	O
on	O
these	O
platforms	O
.	O
</s>
<s>
These	O
early	O
versions	O
of	O
OmniWeb	B-Protocol
also	O
run	O
on	O
Microsoft	B-Application
Windows	I-Application
through	O
the	O
Yellow	B-Operating_System
Box	I-Operating_System
or	O
the	O
OpenStep	B-Operating_System
frameworks	O
.	O
</s>
<s>
From	O
version	O
4.0	O
onwards	O
,	O
OmniWeb	B-Protocol
was	O
developed	O
solely	O
for	O
the	O
OS	O
X	O
platform	O
.	O
</s>
<s>
OmniWeb	B-Protocol
was	O
developed	O
using	O
the	O
Cocoa	B-Operating_System
API	I-Operating_System
which	O
allow	O
it	O
to	O
take	O
full	O
advantage	O
of	O
OS	O
X	O
features	O
.	O
</s>
<s>
It	O
uses	O
Quartz	B-Operating_System
to	O
render	O
images	O
and	O
smooth	O
text	O
.	O
</s>
<s>
It	O
makes	O
use	O
of	O
multiple	O
processors	O
if	O
available	O
,	O
and	O
features	O
an	O
interface	O
that	O
made	O
use	O
of	O
Aqua	B-Application
UI	I-Application
features	O
such	O
as	O
drawers	O
,	O
sheets	O
,	O
and	O
customizable	O
toolbars	O
.	O
</s>
<s>
The	O
Omni	O
Group	O
originally	O
employed	O
its	O
own	O
proprietary	B-Application
HTML	B-Language
layout	B-Protocol
engine	I-Protocol
that	O
use	O
standard	O
API	O
NSText	B-Application
components	O
.	O
</s>
<s>
However	O
,	O
this	O
engine	O
was	O
very	O
slow	O
,	O
particularly	O
when	O
scrolling	O
,	O
and	O
was	O
not	O
fully	O
compatible	O
with	O
the	O
most	O
recent	O
web	O
standards	O
,	O
such	O
as	O
Cascading	B-Language
Style	I-Language
Sheets	I-Language
.	O
</s>
<s>
In	O
OmniWeb	B-Protocol
version	O
4.5	O
,	O
the	O
Omni	O
Group	O
adopted	O
Apple	O
's	O
KHTML-based	O
WebCore	B-Language
rendering	O
engine	O
,	O
which	O
was	O
created	O
by	O
Apple	O
for	O
its	O
Safari	B-Application
browser	I-Application
.	O
</s>
<s>
On	O
August	O
11	O
,	O
2004	O
,	O
the	O
Omni	O
Group	O
released	O
version	O
5.0	O
of	O
OmniWeb	B-Protocol
which	O
added	O
a	O
number	O
of	O
new	O
features	O
.	O
</s>
<s>
Major	O
new	O
features	O
include	O
the	O
use	O
of	O
a	O
custom	O
version	O
of	O
WebKit	B-Language
instead	O
of	O
WebCore	B-Language
,	O
universal	B-Operating_System
binary	I-Operating_System
support	O
,	O
saving	O
to	O
web	O
archive	O
,	O
support	O
for	O
user-defined	O
style	O
sheets	O
,	O
a	O
"	O
Select	O
Next	O
Link	O
"	O
feature	O
,	O
FTP	B-Protocol
folder	O
display	O
,	O
ad-blocking	O
improvements	O
,	O
updated	O
localizations	O
,	O
and	O
many	O
other	O
small	O
changes	O
and	O
bug	O
fixes	O
.	O
</s>
<s>
OmniWeb	B-Protocol
was	O
Omni	O
Group	O
's	O
flagship	O
app	O
but	O
as	O
OS	O
X	O
web	B-Application
browsers	I-Application
improvedApple	O
eventually	O
bundled	O
Safari	B-Application
into	O
OS	O
X	O
and	O
Omni	O
successfully	O
introduced	O
other	O
products	O
such	O
as	O
OmniGraffle	B-Operating_System
and	O
OmniOutliner	B-Operating_System
,	O
OmniWeb	B-Protocol
's	O
importance	O
diminished	O
.	O
</s>
<s>
OmniWeb	B-Protocol
's	O
price	O
was	O
successively	O
lowered	O
,	O
first	O
to	O
$39.95	O
,	O
then	O
on	O
February	O
24	O
,	O
2009	O
,	O
Omni	O
Group	O
announced	O
that	O
OmniWeb	B-Protocol
would	O
be	O
made	O
available	O
for	O
free	O
,	O
a	O
change	O
from	O
its	O
previous	O
price	O
of	O
$14.95	O
.	O
</s>
<s>
The	O
Omni	O
Group	O
official	O
website	O
now	O
states	O
that	O
the	O
browser	B-Application
is	O
no	O
longer	O
under	O
active	O
development	O
.	O
</s>
<s>
Workspaces	O
:	O
groups	O
of	O
web	B-Application
browser	I-Application
windows	O
and	O
tabs	O
in	O
them	O
.	O
</s>
<s>
Ad	O
blocking	O
:	O
OmniWeb	B-Protocol
uses	O
a	O
powerful	O
pattern	O
match	O
ad	O
blocking	O
feature	O
to	O
stop	O
images	O
from	O
loading	O
from	O
servers	O
matching	O
the	O
pattern	O
.	O
</s>
<s>
Shortcuts	B-Protocol
:	O
allows	O
one	O
to	O
type	O
a	O
key	O
word	O
or	O
phrase	O
to	O
open	O
a	O
certain	O
web	O
site	O
or	O
begin	O
a	O
specific	O
web	O
search	O
.	O
</s>
<s>
Site-specific	O
preferences	O
:	O
OmniWeb	B-Protocol
allows	O
you	O
to	O
specify	O
preferences	O
that	O
apply	O
to	O
specific	O
websites	O
.	O
</s>
<s>
OmniWeb	B-Protocol
was	O
popular	O
in	O
the	O
early	O
2000s	O
when	O
the	O
OmniGroup	O
's	O
experience	O
developing	O
for	O
OpenStep	B-Operating_System
(	O
which	O
became	O
the	O
foundation	O
for	O
Mac	B-Application
OS	I-Application
X	O
)	O
gave	O
them	O
an	O
edge	O
over	O
other	O
developers	O
.	O
</s>
<s>
Until	O
Apple	B-Application
's	I-Application
Safari	I-Application
,	O
the	O
Omni	O
Group	O
had	O
the	O
best	O
support	O
for	O
Mac	B-Application
OS	I-Application
X	O
technologies	O
among	O
its	O
competition	O
(	O
chiefly	O
Mozilla	B-Application
Firefox	I-Application
and	O
Internet	B-Protocol
Explorer	I-Protocol
for	I-Protocol
Mac	I-Protocol
)	O
.	O
</s>
<s>
John	O
Siracusa	O
,	O
a	O
technology	O
journalist	O
and	O
critic	O
writing	O
for	O
Ars	O
Technica	O
,	O
said	O
,	O
"	O
Finding	O
[	O
this	O
level	O
of	O
functionality ]	O
in	O
a	O
proper	O
Mac	B-Application
OS	I-Application
X	O
application	O
from	O
a	O
respected	O
developer	O
with	O
a	O
proven	O
track	O
record	O
is	O
like	O
finding	O
a	O
perfect	O
1/10	O
,	O
000th	O
scale	O
replica	O
of	O
the	O
Eiffel	O
Tower	O
in	O
a	O
box	O
of	O
crackerjacks	O
.	O
</s>
