<s>
Dooble	B-Language
is	O
a	O
free	B-License
and	I-License
open-source	I-License
web	B-Application
browser	I-Application
that	O
was	O
created	O
to	O
offer	O
improved	O
privacy	O
for	O
users	O
.	O
</s>
<s>
Currently	O
,	O
Dooble	B-Language
is	O
available	O
for	O
FreeBSD	B-Operating_System
,	O
Linux	B-Application
,	O
macOS	B-Application
,	O
OS/2	B-Application
,	O
and	O
Windows	B-Application
.	O
</s>
<s>
Dooble	B-Language
uses	O
Qt	B-Language
for	O
its	O
user	O
interface	O
and	O
abstraction	O
from	O
the	O
operating	O
system	O
and	O
processor	O
architecture	O
.	O
</s>
<s>
As	O
a	O
result	O
,	O
Dooble	B-Language
should	O
be	O
portable	O
to	O
any	O
system	O
that	O
supports	O
OpenSSL	B-Language
,	O
POSIX	B-Operating_System
threads	I-Operating_System
,	O
Qt	B-Language
,	O
SQLite	B-Language
,	O
and	O
other	O
libraries	O
.	O
</s>
<s>
Dooble	B-Language
is	O
designed	O
and	O
implemented	O
in	O
order	O
to	O
improve	O
privacy	O
and	O
usability	O
.	O
</s>
<s>
Dooble	B-Language
includes	O
a	O
simple	O
bookmarking	O
system	O
.	O
</s>
<s>
Users	O
may	O
modify	O
bookmarks	O
via	O
a	O
bookmarks	O
browser	B-Application
and	O
a	O
popup	O
that	O
's	O
accessible	O
from	O
the	O
location	O
widget	O
.	O
</s>
<s>
Along	O
with	O
standard	O
cookie	B-Application
management	O
options	O
,	O
Dooble	B-Language
also	O
provides	O
a	O
mechanism	O
that	O
automatically	O
removes	O
cookies	B-Application
.	O
</s>
<s>
If	O
permitted	O
,	O
Dooble	B-Language
will	O
occasionally	O
remove	O
undesired	O
HTTP	B-Application
cookies	I-Application
.	O
</s>
<s>
Dooble	B-Language
Web	I-Language
Browser	I-Language
provides	O
according	O
to	O
the	O
News	O
Portal	O
Hongkiat	O
an	O
"	O
easy	O
to	O
use	O
download	O
manager	O
"	O
.	O
</s>
<s>
Dooble	B-Language
partially	O
integrates	O
the	O
distributed	O
search	O
engine	O
YaCy	B-Application
.	O
</s>
<s>
Most	O
of	O
the	O
data	O
that	O
Dooble	B-Language
retains	O
is	O
stored	O
using	O
authenticated	O
encryption	O
.	O
</s>
<s>
Dooble	B-Language
does	O
not	O
encode	O
file	O
associations	O
and	O
user	O
settings	O
.	O
</s>
<s>
Dooble	B-Language
also	O
provides	O
a	O
session-based	O
model	O
using	O
temporary	O
keys	O
.	O
</s>
<s>
Included	O
is	O
a	O
non-JavaScript	O
file	O
manager	O
and	O
FTP	B-Protocol
browser	B-Application
.	O
</s>
<s>
Version	O
1.53	O
introduced	O
Gopher	B-Protocol
(	O
protocol	O
)	O
support	O
.	O
</s>
<s>
A	O
security	O
passphrase	O
can	O
be	O
created	O
for	O
the	O
browser	B-Application
.	O
</s>
<s>
The	O
password	O
can	O
be	O
set	O
from	O
the	O
Safe	O
area	O
of	O
the	O
browser	B-Application
settings	O
.	O
</s>
<s>
Version	O
1.26	O
of	O
Dooble	B-Language
introduced	O
support	O
for	O
addons	B-Operating_System
.	O
</s>
<s>
The	O
TorBrowser	O
Add-On	B-Operating_System
based	O
on	O
Vidalia	B-Language
was	O
added	O
in	O
version	O
1.40	O
.	O
</s>
<s>
The	O
Vidalia	B-Language
plugin	O
was	O
removed	O
in	O
version	O
1.49	O
.	O
</s>
<s>
The	O
Add-On	B-Operating_System
with	O
the	O
name	O
InterFace	O
expands	O
the	O
browser	B-Application
with	O
social	O
network	O
functions	O
like	O
a	O
messenger	O
with	O
group	O
chat	O
,	O
a	O
friend	O
list	O
,	O
an	O
e-mail	O
client	O
,	O
a	O
chess	O
game	O
,	O
and	O
a	O
forum	O
function	O
like	O
a	O
bulletin	O
board	O
.	O
</s>
<s>
InterFace	O
is	O
based	O
on	O
Qt	B-Language
and	O
can	O
be	O
integrated	O
as	O
a	O
plugin	O
.	O
</s>
<s>
Configurable	O
proxy	B-Application
settings	O
provide	O
reasonable	O
flexibility	O
.	O
</s>
<s>
Dooble	B-Language
supports	O
session	O
restoration	O
for	O
authenticated	O
sessions	O
.	O
</s>
<s>
If	O
Dooble	B-Language
exits	O
prematurely	O
,	O
the	O
user	O
may	O
restore	O
previous	O
tabs	O
and	O
windows	B-Application
at	O
the	O
next	O
authenticated	O
session	O
.	O
</s>
<s>
Since	O
this	O
technology	O
may	O
raise	O
privacy	O
issues	O
with	O
some	O
users	O
,	O
Dooble	B-Language
provides	O
a	O
means	O
of	O
blocking	O
external	O
content	O
.	O
</s>
<s>
Since	O
November	O
5	O
,	O
2017	O
it	O
uses	O
the	O
Qt	B-Language
WebEngine	O
.	O
</s>
<s>
Dooble	B-Language
was	O
also	O
available	O
on	O
Nokia	O
's	O
N900	B-Application
.	O
</s>
<s>
In	O
2014	O
Dooble	B-Language
was	O
rated	O
as	O
the	O
ninth	O
of	O
ten	O
"	O
top	O
"	O
Linux	B-Application
browsers	B-Application
by	O
Jack	O
Wallen	O
.	O
</s>
<s>
Dooble	B-Language
further	O
has	O
been	O
announced	O
in	O
2015	O
as	O
one	O
of	O
the	O
top	O
five	O
best	O
secure	O
browsers	B-Application
.	O
</s>
<s>
PCWorld	O
reviewed	O
Dooble	B-Language
in	O
2015	O
on	O
the	O
feature	O
side	O
as	O
"	O
rendering	O
quickly	O
,	O
even	O
on	O
image-heavy	O
sites	O
"	O
.	O
</s>
<s>
The	O
Guardian	O
recommended	O
Dooble	B-Language
in	O
2015	O
as	O
an	O
alternative	O
browser	B-Application
against	O
surveillance	O
:	O
"	O
Try	O
out	O
a	O
privacy-focused	O
browser	B-Application
such	O
as	O
Dooble	B-Language
.	O
</s>
