<s>
Searx	B-Application
(	O
;	O
stylized	O
as	O
searX	B-Application
)	O
is	O
a	O
free	B-Application
and	O
open-source	B-License
metasearch	B-Application
engine	I-Application
,	O
available	O
under	O
the	O
GNU	B-Application
Affero	I-Application
General	I-Application
Public	I-Application
License	I-Application
version	O
3	O
,	O
with	O
the	O
aim	O
of	O
protecting	O
the	O
privacy	O
of	O
its	O
users	O
.	O
</s>
<s>
To	O
this	O
end	O
,	O
Searx	B-Application
does	O
not	O
share	O
users	O
 '	O
IP	B-Protocol
addresses	I-Protocol
or	O
search	O
history	O
with	O
the	O
search	B-Application
engines	I-Application
from	O
which	O
it	B-General_Concept
gathers	O
results	O
.	O
</s>
<s>
Tracking	O
cookies	O
served	O
by	O
the	O
search	B-Application
engines	I-Application
are	O
blocked	O
,	O
preventing	O
user-profiling-based	B-Algorithm
results	I-Algorithm
modification	I-Algorithm
.	O
</s>
<s>
By	O
default	O
,	O
Searx	B-Application
queries	O
are	O
submitted	O
via	O
HTTP	B-Protocol
POST	I-Protocol
,	O
to	O
prevent	O
users	O
 '	O
query	O
keywords	O
from	O
appearing	O
in	O
webserver	O
logs	O
.	O
</s>
<s>
Searx	B-Application
was	O
inspired	O
by	O
the	O
Seeks	O
project	O
,	O
though	O
it	B-General_Concept
does	O
not	O
implement	O
Seeks	O
 '	O
peer-to-peer	O
user-sourced	O
results	O
ranking	O
.	O
</s>
<s>
Each	O
search	O
result	O
is	O
given	O
as	O
a	O
direct	O
link	O
to	O
the	O
respective	O
site	O
,	O
rather	O
than	O
a	O
tracked	O
redirect	O
link	O
as	O
used	O
by	O
Google	B-Application
.	O
</s>
<s>
The	O
cached	O
links	O
point	O
to	O
saved	O
versions	O
of	O
a	O
page	O
on	O
the	O
Wayback	O
Machine	O
,	O
while	O
the	O
proxied	O
links	O
allow	O
viewing	O
the	O
current	O
live	O
page	O
via	O
a	O
Searx-based	O
web	O
proxy	O
.	O
</s>
<s>
In	O
addition	O
to	O
the	O
general	O
search	O
,	O
the	O
engine	O
also	O
features	O
tabs	O
to	O
search	O
within	O
specific	O
domains	O
:	O
files	O
,	O
images	O
,	O
IT	B-General_Concept
,	O
maps	O
,	O
music	O
,	O
news	O
,	O
science	O
,	O
social	O
media	O
,	O
and	O
videos	O
.	O
</s>
<s>
Users	O
can	O
run	O
private	O
instances	O
of	O
Searx	B-Application
on	O
their	O
own	O
computer	B-Protocol
,	O
but	O
there	O
are	O
also	O
many	O
public	O
,	O
user-run	O
,	O
Searx	B-Application
instances	O
,	O
some	O
of	O
which	O
are	O
available	O
as	O
Tor	B-Application
hidden	O
services	O
.	O
</s>
<s>
Meta-Searx	O
instances	O
can	O
also	O
be	O
used	O
to	O
forward	O
the	O
search	O
query	O
to	O
a	O
random	O
public	O
instance	O
.	O
</s>
<s>
A	O
public	O
API	B-General_Concept
is	O
available	O
for	O
Searx	B-Application
,	O
as	O
well	O
as	O
Firefox	B-Application
search	O
provider	O
plugins	O
.	O
</s>
<s>
Across	O
all	O
categories	O
,	O
Searx	B-Application
can	O
fetch	O
search	B-Application
results	I-Application
from	O
about	O
82	O
different	O
engines	O
.	O
</s>
<s>
This	O
includes	O
major	O
search	B-Application
engines	I-Application
and	O
site-specific	O
searches	O
like	O
Bing	B-Application
,	O
Google	B-Application
,	O
Reddit	B-Application
,	O
Wikipedia	O
,	O
Yahoo	B-Application
,	O
and	O
Yandex	B-Application
.	O
</s>
<s>
The	O
engines	O
used	O
for	O
each	O
search	O
category	O
can	O
be	O
set	O
via	O
a	O
"	O
preferences	O
"	O
interface	O
,	O
and	O
these	O
settings	O
will	O
be	O
saved	O
in	O
a	O
cookie	O
in	O
the	O
user	O
's	O
web	O
browser	O
,	O
rather	O
than	O
on	O
the	O
server	O
side	O
,	O
since	O
for	O
privacy	O
reasons	O
,	O
Searx	B-Application
does	O
not	O
implement	O
a	O
user	B-General_Concept
login	I-General_Concept
model	O
.	O
</s>
<s>
Other	O
settings	O
such	O
as	O
the	O
search	O
interface	O
language	O
and	O
the	O
search	B-Application
results	I-Application
language	O
(	O
over	O
20	O
languages	O
are	O
available	O
)	O
can	O
be	O
set	O
the	O
same	O
way	O
.	O
</s>
<s>
In	O
addition	O
to	O
the	O
preferences	O
cookie	O
,	O
it	B-General_Concept
is	O
possible	O
on	O
each	O
query	O
to	O
modify	O
the	O
engines	O
used	O
,	O
search	O
categories	O
selected	O
,	O
and/or	O
languages	O
to	O
search	O
in	O
by	O
specifying	O
one	O
or	O
more	O
of	O
the	O
following	O
textual	O
search	O
operators	O
before	O
the	O
search	O
keywords	O
.	O
</s>
<s>
operators	O
can	O
be	O
specified	O
more	O
than	O
once	O
to	O
select	O
multiple	O
categories	O
or	O
engines	O
,	O
for	O
example	O
!	O
google	B-Application
!	O
deviantart	O
?	O
images	O
:japanese	O
cow	O
.	O
</s>
<s>
Any	O
user	O
may	O
run	O
their	O
own	O
instance	O
of	O
Searx	B-Application
,	O
which	O
can	O
be	O
done	O
to	O
maximize	O
privacy	O
,	O
avoid	O
congestion	O
on	O
public	O
instances	O
,	O
preserve	O
customized	O
settings	O
(	O
even	O
if	O
browser	O
cookies	O
are	O
cleared	O
)	O
,	O
allow	O
auditing	O
of	O
the	O
source	O
code	O
being	O
run	O
,	O
and	O
more	O
.	O
</s>
<s>
Users	O
may	O
include	O
their	O
Searx	B-Application
instances	O
on	O
the	O
editable	O
list	O
of	O
all	O
public	O
instances	O
,	O
or	O
keep	O
them	O
private	O
.	O
</s>
<s>
It	B-General_Concept
is	O
also	O
possible	O
to	O
add	O
custom	O
search	B-Application
engines	I-Application
to	O
a	O
self-hosted	O
instance	O
that	O
are	O
not	O
available	O
on	O
the	O
public	O
instances	O
.	O
</s>
<s>
Another	O
reason	O
to	O
use	O
different	O
Searx	B-Application
instances	O
,	O
or	O
to	O
run	O
one	O
's	O
own	O
,	O
is	O
that	O
,	O
as	O
of	O
2019	O
,	O
Google	B-Application
has	O
begun	O
to	O
block	O
some	O
instances	O
,	O
including	O
some	O
of	O
the	O
IP	B-Protocol
addresses	I-Protocol
used	O
by	O
searx.me	O
(	O
former	O
instance	O
run	O
by	O
the	O
developer	O
)	O
,	O
from	O
querying	O
it	B-General_Concept
,	O
resulting	O
in	O
a	O
"	O
google	B-Application
(	O
unexpected	O
crash	O
:	O
CAPTCHA	O
required	O
)	O
"	O
error	O
.	O
</s>
<s>
In	O
response	O
,	O
some	O
instances	O
have	O
been	O
modified	O
to	O
silently	O
skip	O
trying	O
to	O
search	O
with	O
Google	B-Application
,	O
even	O
when	O
it	B-General_Concept
's	O
the	O
only	O
engine	O
specified	O
.	O
</s>
