<s>
iCab	B-Operating_System
is	O
a	O
web	B-Application
browser	I-Application
for	O
Mac	B-Application
OS	I-Application
by	O
Alexander	O
Clauss	O
,	O
derived	O
from	O
Crystal	O
Atari	O
Browser	B-Application
(	O
CAB	O
)	O
for	O
Atari	B-Application
TOS	I-Application
compatible	O
computers	O
.	O
</s>
<s>
It	O
was	O
one	O
of	O
the	O
few	O
browsers	B-Application
still	O
updated	O
for	O
the	O
classic	B-Application
Mac	I-Application
OS	I-Application
prior	O
to	O
that	O
version	O
being	O
discontinued	O
after	O
version	O
3.0.5	O
in	O
2008	O
;	O
Classilla	B-Protocol
was	O
the	O
last	O
browser	B-Application
that	O
was	O
maintained	O
for	O
that	O
OS	O
but	O
it	O
was	O
discontinued	O
in	O
2021	O
.	O
</s>
<s>
iCab	B-Operating_System
2.9.9	O
supports	O
both	O
68k	B-Device
and	O
PowerPC	B-Architecture
Macintosh	B-Application
systems	I-Application
running	O
System	B-Operating_System
7.5	I-Operating_System
through	O
Mac	B-Application
OS	I-Application
9.2.2	O
.	O
</s>
<s>
While	O
no	O
longer	O
maintained	O
,	O
iCab	B-Operating_System
2.9.9	O
is	O
still	O
available	O
for	O
download	O
and	O
registration	O
.	O
</s>
<s>
iCab	B-Operating_System
2.9.8	O
runs	O
natively	O
on	O
early	O
versions	O
of	O
Mac	B-Application
OS	I-Application
X	I-Application
,	O
but	O
Mac	B-Application
OS	I-Application
X	I-Application
compatible	O
versions	O
of	O
iCab	B-Operating_System
2.x	O
are	O
no	O
longer	O
officially	O
available	O
for	O
download	O
.	O
</s>
<s>
iCab	B-Operating_System
3.x	O
can	O
run	O
on	O
PowerPC	B-Architecture
systems	O
running	O
Mac	B-Operating_System
OS	I-Operating_System
8.5	I-Operating_System
through	O
Mac	B-Application
OS	I-Application
9.2.2	O
,	O
or	O
PowerPC	B-Architecture
or	O
Intel	B-Operating_System
systems	O
running	O
Mac	B-Application
OS	I-Application
X	I-Application
10.1	O
or	O
later	O
.	O
</s>
<s>
iCab	B-Operating_System
3	O
was	O
last	O
updated	O
in	O
January	O
2008	O
.	O
</s>
<s>
iCab	B-Operating_System
4	O
was	O
rewritten	O
to	O
use	O
the	O
Cocoa	B-Operating_System
API	I-Operating_System
and	O
the	O
WebKit	B-Language
rendering	B-Protocol
engine	I-Protocol
.	O
</s>
<s>
It	O
can	O
run	O
on	O
PowerPC	B-Architecture
or	O
Intel	B-Operating_System
systems	O
running	O
Mac	B-Application
OS	I-Application
10.3.9	O
or	O
later	O
.	O
</s>
<s>
iCab	B-Operating_System
5	O
was	O
released	O
on	O
June	O
12	O
,	O
2012	O
.	O
</s>
<s>
It	O
runs	O
on	O
Mac	B-Application
OS	I-Application
10.5	O
or	O
later	O
.	O
</s>
<s>
iCab	B-Operating_System
6	O
was	O
rewritten	O
using	O
the	O
new	O
technologies	O
in	O
macOS	B-Application
Big	O
Sur	O
and	O
released	O
on	O
October	O
31	O
,	O
2020	O
.	O
</s>
<s>
It	O
runs	O
on	O
macOS	B-Application
10.13	O
or	O
later	O
.	O
</s>
<s>
The	O
first	O
versions	O
of	O
iCab	B-Operating_System
were	O
criticized	O
for	O
not	O
supporting	O
CSS	B-Language
and	O
DOM	B-General_Concept
.	O
</s>
<s>
iCab	B-Operating_System
3	O
introduced	O
improved	O
rendering	O
capabilities	O
,	O
including	O
support	O
for	O
CSS2	B-Language
and	O
Unicode	O
(	O
via	O
the	O
ATSUI	B-Operating_System
toolkit	O
)	O
.	O
</s>
<s>
iCab	B-Operating_System
4	O
switched	O
to	O
WebKit	B-Language
for	O
its	O
rendering	B-Protocol
engine	I-Protocol
,	O
giving	O
it	O
the	O
same	O
rendering	O
abilities	O
as	O
Apple	B-Application
's	I-Application
Safari	I-Application
browser	B-Application
.	O
</s>
<s>
On	O
7	O
June	O
2009	O
,	O
iCab	B-Operating_System
4.6	O
,	O
using	O
the	O
WebKit	B-Language
rendering	B-Protocol
engine	I-Protocol
,	O
became	O
the	O
first	O
desktop	O
browser	B-Application
released	O
to	O
display	O
a	O
score	O
of	O
100/100	O
and	O
pass	O
the	O
Acid3	O
test	O
.	O
</s>
<s>
Apple	B-Application
's	I-Application
Safari	I-Application
4	O
browser	B-Application
was	O
released	O
one	O
day	O
later	O
and	O
has	O
been	O
officially	O
credited	O
as	O
being	O
the	O
first	O
official	O
release	O
browser	B-Application
to	O
pass	O
the	O
Acid3	O
test	O
with	O
a	O
score	O
of	O
100/100	O
.	O
</s>
<s>
iCab	B-Operating_System
features	O
a	O
filter	O
manager	O
which	O
allows	O
users	O
to	O
avoid	O
downloading	O
advertisements	O
and	O
other	O
content	O
.	O
</s>
<s>
Currently	O
iCab	B-Operating_System
comes	O
with	O
two	O
filters	O
(	O
advertisements	O
and	O
video	O
)	O
.	O
</s>
<s>
Other	O
kinds	O
of	O
filters	O
add	O
features	O
,	O
such	O
as	O
the	O
YouTube	B-General_Concept
video	I-General_Concept
filter	O
which	O
adds	O
a	O
download	O
link	O
on	O
all	O
YouTube	B-General_Concept
page	O
views	O
.	O
</s>
<s>
iCab	B-Operating_System
has	O
features	O
for	O
website	O
developers	O
,	O
including	O
an	O
HTML	B-Language
validity	O
checker	O
,	O
an	O
automatic	O
page	O
refresh	O
option	O
,	O
a	O
Web	B-Application
Inspector	I-Application
,	O
DOM	B-General_Concept
Inspector	O
,	O
JavaScript	B-Language
debugger	I-Language
,	O
and	O
a	O
Console	O
.	O
</s>
<s>
iCab	B-Operating_System
's	O
"	O
Automatic	O
Update	O
"	O
option	O
,	O
for	O
any	O
page	O
it	O
is	O
rendering	O
directly	O
from	O
the	O
local	O
hard	O
disk	O
,	O
will	O
automatically	O
reload	O
the	O
page	O
when	O
changes	O
are	O
saved	O
to	O
disk	O
.	O
</s>
<s>
The	O
HTML	B-Language
syntax	I-Language
validity	O
checker	O
displays	O
a	O
smiley	O
face	O
in	O
the	O
Status	O
Bar	O
and	O
also	O
,	O
optionally	O
,	O
in	O
the	O
Toolbar	O
.	O
</s>
<s>
The	O
HTML	B-Language
syntax	I-Language
validator	O
was	O
first	O
seen	O
in	O
the	O
same	O
author	O
's	O
earlier	O
web	B-Application
browser	I-Application
,	O
CAB	O
.	O
</s>
<s>
iCab	B-Operating_System
's	O
Download	O
manager	O
allows	O
the	O
user	O
to	O
start	O
,	O
stop	O
,	O
resume	O
and	O
review	O
downloads	O
.	O
</s>
<s>
It	O
can	O
save	O
as	O
portable	O
web	O
archives	O
(	O
a	O
ZIP	B-General_Concept
archive	I-General_Concept
containing	O
HTML	B-Language
,	O
images	O
and	O
other	O
files	O
)	O
,	O
or	O
as	O
individual	O
files	O
on	O
the	O
local	O
hard	O
drive	O
.	O
</s>
<s>
iCab	B-Operating_System
also	O
contains	O
the	O
following	O
features	O
:	O
</s>
<s>
Javascript	B-Language
and	O
CSS2	B-Language
support	O
.	O
</s>
<s>
Adjust	O
rendering	O
,	O
network	O
,	O
JavaScript	B-Language
,	O
and	O
cookies	O
settings	O
for	O
individual	O
sites	O
or	O
types	O
of	O
pages	O
.	O
</s>
<s>
pretending	O
to	O
be	O
another	O
browser	B-Application
)	O
.	O
</s>
