<s>
Avast	B-Protocol
Secure	I-Protocol
Browser	I-Protocol
(	O
formerly	O
Avast	O
!	O
</s>
<s>
SafeZone	B-Protocol
)	O
is	O
an	O
Avast	O
Software	O
web	B-Application
browser	I-Application
included	O
for	O
optional	O
installation	O
in	O
the	O
Avast	B-Operating_System
Antivirus	I-Operating_System
installer	O
since	O
2016	O
,	O
but	O
it	O
is	O
also	O
available	O
on	O
its	O
website	O
.	O
</s>
<s>
It	O
is	O
based	O
on	O
the	O
open	O
source	O
Chromium	B-Language
project	I-Language
.	O
</s>
<s>
It	O
is	O
available	O
for	O
Microsoft	B-Application
Windows	I-Application
,	O
macOS	B-Application
,	O
iOS	B-Application
,	O
and	O
Android	B-Application
.	O
</s>
<s>
Avast	O
Online	O
Security	O
is	O
an	O
extension	B-Protocol
for	O
Google	B-Application
Chrome	I-Application
,	O
Microsoft	B-Application
Edge	I-Application
,	O
Mozilla	B-Application
Firefox	I-Application
and	O
Opera	B-Application
browsers	I-Application
that	O
has	O
some	O
similar	O
features	O
to	O
Avast	B-Protocol
Secure	I-Protocol
Browser	I-Protocol
.	O
</s>
<s>
Initially	O
,	O
Avast	B-Protocol
Secure	I-Protocol
Browser	I-Protocol
was	O
bundled	O
with	O
paid	O
versions	O
of	O
Avast	B-Operating_System
Antivirus	I-Operating_System
.	O
</s>
<s>
Avast	B-Protocol
Secure	I-Protocol
Browser	I-Protocol
was	O
originally	O
called	O
"	O
SafeZone	B-Protocol
"	O
before	O
being	O
revamped	O
and	O
rebranded	O
as	O
"	O
Avast	B-Protocol
Secure	I-Protocol
Browser	I-Protocol
"	O
in	O
early	O
2018	O
.	O
</s>
<s>
Before	O
the	O
revamp	O
and	O
rename	O
,	O
SafeZone	B-Protocol
's	O
design	O
was	O
similar	O
to	O
that	O
of	O
the	O
Opera	B-Application
browser	I-Application
.	O
</s>
<s>
SafeZone	B-Protocol
turned	O
on	O
automatically	O
when	O
the	O
user	O
visited	O
financial	O
or	O
shopping	O
sites	O
to	O
conduct	O
online	O
transactions	O
.	O
</s>
<s>
In	O
December	O
2015	O
,	O
Tavis	O
Ormandy	O
identified	O
a	O
security	O
vulnerability	O
that	O
could	O
allow	O
hackers	O
to	O
insert	O
malicious	O
JavaScript	B-Language
code	O
into	O
the	O
browsers	B-Application
of	O
Avast	B-Protocol
SafeZone	I-Protocol
Browser	I-Protocol
users	O
.	O
</s>
<s>
Anti-tracking	O
and	O
anti-fingerprinting	O
:	O
The	O
software	O
prevents	O
the	O
collection	O
of	O
information	O
about	O
the	O
user	O
's	O
computer	O
or	O
browsing	O
history	O
that	O
could	O
be	O
used	O
to	O
build	O
a	O
profile	O
of	O
the	O
user	O
.	O
</s>
