<s>
XULRunner	B-Language
is	O
a	O
discontinued	O
,	O
packaged	O
version	O
of	O
the	O
Mozilla	B-Language
platform	I-Language
to	O
enable	O
standalone	O
desktop	O
application	O
development	O
using	O
XUL	B-Application
,	O
developed	O
by	O
Mozilla	B-Operating_System
.	O
</s>
<s>
It	O
replaced	O
the	O
Gecko	B-Language
Runtime	I-Language
Environment	I-Language
,	O
a	O
stalled	O
project	O
with	O
a	O
similar	O
purpose	O
.	O
</s>
<s>
The	O
first	O
stable	O
developer	O
preview	O
of	O
XULRunner	B-Language
was	O
released	O
in	O
February	O
2006	O
,	O
based	O
on	O
the	O
Mozilla	B-Operating_System
1.8	O
code	O
base	O
.	O
</s>
<s>
Mozilla	B-Operating_System
stopped	O
supporting	O
the	O
development	O
of	O
XULrunner	B-Language
in	O
July	O
2015	O
.	O
</s>
<s>
XULRunner	B-Language
was	O
a	O
"	O
technology	O
experiment	O
"	O
,	O
not	O
a	O
shipped	O
product	O
,	O
meaning	O
there	O
were	O
no	O
official	O
XULRunner	B-Language
releases	O
,	O
only	O
stable	O
builds	O
based	O
on	O
the	O
same	O
code	O
as	O
a	O
corresponding	O
Firefox	B-Application
release	O
.	O
</s>
<s>
XULRunner	B-Language
is	O
a	O
runtime	O
that	O
can	O
be	O
used	O
to	O
bootstrap	O
multiple	O
XUL	B-Application
+	O
XPCOM	B-Application
applications	O
that	O
are	O
equal	O
in	O
capabilities	O
to	O
Firefox	B-Application
and	O
Thunderbird	B-Application
.	O
</s>
<s>
XULRunner	B-Language
stores	O
a	O
variety	O
of	O
configuration	O
data	O
(	O
bookmarks	O
,	O
cookies	O
,	O
contacts	O
etc	O
.	O
)	O
</s>
<s>
in	O
internally	O
managed	O
SQLite	B-Language
databases	O
,	O
and	O
even	O
offer	O
an	O
add-on	O
to	O
manage	O
SQLite	B-Language
databases	O
.	O
</s>
<s>
Mozilla	B-Application
Firefox	I-Application
,	O
Mozilla	B-Application
Thunderbird	I-Application
,	O
Nightingale	B-Language
,	O
Songbird	B-Application
,	O
Flickr	B-Algorithm
Uploadr	O
,	O
SeaMonkey	B-Language
,	O
Conkeror	B-Protocol
,	O
Sunbird	B-Language
,	O
Miro	B-Language
,	O
Joost	B-Operating_System
,	O
and	O
TomTom	O
Home	O
2.0	O
ran	O
on	O
XULRunner	B-Language
.	O
</s>
<s>
Starting	O
with	O
version	O
3.0	O
,	O
Mozilla	B-Application
Firefox	I-Application
uses	O
a	O
"	O
private	O
"	O
XULRunner	B-Language
,	O
meaning	O
the	O
framework	O
is	O
installed	O
locally	O
in	O
the	O
application	O
directory	O
.	O
</s>
<s>
Kiwix	B-Application
,	O
an	O
offline	O
browser	O
for	O
Wikipedia	O
and	O
Project	O
Gutenberg	O
,	O
used	O
XULRunner	B-Language
until	O
2017	O
.	O
</s>
<s>
The	O
Google	B-Application
AdWords	I-Application
Editor	O
used	O
XULRunner	B-Language
until	O
2010	O
,	O
as	O
did	O
Evergreen	B-Language
ILS	I-Language
,	O
an	O
open-source	O
library	O
automation	O
system	O
.	O
</s>
<s>
The	O
fourth	O
version	O
of	O
the	O
video	O
game	O
series	O
Simon	O
the	O
Sorcerer	O
,	O
Simon	B-Application
the	I-Application
Sorcerer	I-Application
4	I-Application
:	I-Application
Chaos	I-Application
Happens	I-Application
,	O
uses	O
XULRunner	B-Language
.	O
</s>
<s>
In	O
addition	O
,	O
the	O
XULRunner	B-Language
package	O
provided	O
access	O
to	O
ActiveX	B-Application
Control	I-Application
functionality	O
previously	O
found	O
in	O
a	O
(	O
now	O
defunct	O
)	O
third-party	O
ActiveX	B-Application
Control	I-Application
built	O
off	O
the	O
Mozilla	B-Operating_System
source	O
code	O
.	O
</s>
<s>
Applications	O
using	O
this	O
application	B-Application
programming	I-Application
interface	I-Application
(	O
API	B-Application
)	O
may	O
have	O
function	O
with	O
XULRunner	B-Language
installed	O
and	O
registered	O
.	O
</s>
<s>
Starting	O
with	O
Lotus	B-Operating_System
Notes	I-Operating_System
version	O
8.5.1	O
,	O
IBM	O
deployed	O
XULRunner	B-Language
to	O
provide	O
Notes	O
client	O
support	O
for	O
XPages	B-Application
applications	O
.	O
</s>
<s>
In	O
January	O
2014	O
,	O
dropping	O
XULRunner	B-Language
support	O
was	O
discussed	O
by	O
Mozilla	B-Operating_System
developers	O
.	O
</s>
<s>
In	O
July	O
2015	O
,	O
Mozilla	B-Operating_System
stopped	O
supporting	O
the	O
development	O
of	O
XULrunner	B-Language
,	O
and	O
the	O
community	O
page	O
has	O
been	O
taken	O
down	O
.	O
</s>
<s>
As	O
of	O
the	O
beginning	O
of	O
2016	O
,	O
it	O
had	O
been	O
dropped	O
from	O
the	O
package	B-Application
database	I-Application
of	O
most	O
Linux	O
distributions	O
,	O
including	O
Gentoo	O
,	O
Debian	O
,	O
and	O
Ubuntu	O
.	O
</s>
<s>
XULRunner	B-Language
can	O
still	O
be	O
installed	O
separately	O
,	O
and	O
many	O
XULRunner-dependent	O
applications	O
can	O
be	O
switched	O
over	O
fairly	O
easily	O
.	O
</s>
<s>
Also	O
developing	O
and	O
running	O
XULRunner	B-Language
apps	O
is	O
still	O
possible	O
through	O
Firefox	B-Application
as	O
well	O
as	O
previous	O
or	O
custom	O
builds	O
of	O
XULRunner	B-Language
.	O
</s>
<s>
However	O
,	O
its	O
disappearance	O
has	O
caused	O
some	O
dependent	O
packages	O
to	O
be	O
removed	O
from	O
package	B-Application
databases	I-Application
.	O
</s>
