<s>
BrowserQuest	B-Protocol
was	O
a	O
free	B-Application
massively	B-Protocol
multiplayer	I-Protocol
online	I-Protocol
role-playing	I-Protocol
game	I-Protocol
created	O
by	O
French	O
developer	O
Little	O
Workshop	O
and	O
the	B-Operating_System
Mozilla	I-Operating_System
Foundation	I-Operating_System
.	O
</s>
<s>
BrowserQuest	B-Protocol
is	O
a	O
demonstration	O
of	O
a	O
number	O
of	O
modern	O
web	O
technologies	O
.	O
</s>
<s>
It	O
is	O
written	O
in	O
HTML5	B-Application
,	O
utilizing	O
WebSockets	B-Protocol
for	O
multiplayer	O
networking	O
,	O
and	O
is	O
playable	O
from	O
modern	O
web	O
browsers	O
.	O
</s>
<s>
The	O
client	B-Protocol
makes	O
use	O
of	O
HTML5	B-Application
's	O
canvas	B-Language
element	I-Language
to	O
render	O
the	O
graphics	O
,	O
web	O
workers	O
to	O
initialize	O
the	O
map	O
without	O
affecting	O
the	O
rest	O
of	O
the	O
page	O
,	O
localStorage	O
to	O
save	O
progress	O
,	O
media	O
queries	O
to	O
dynamically	O
resize	O
the	O
game	O
to	O
the	O
device	O
,	O
and	O
HTML5	B-Language
Audio	I-Language
to	O
render	O
the	O
sound	O
.	O
</s>
<s>
The	O
server	B-Application
is	O
written	O
in	O
JavaScript	O
,	O
and	O
runs	O
in	O
Node.js	B-Language
.	O
</s>
<s>
The	O
server	B-Application
and	O
browser	O
communicate	O
using	O
WebSockets	B-Protocol
.	O
</s>
<s>
Both	O
BrowserQuest	B-Protocol
's	O
client	B-Protocol
and	O
server	B-Application
source	O
code	O
are	O
available	O
on	O
GitHub	B-Application
.	O
</s>
<s>
Its	O
code	O
is	O
licensed	O
under	O
MPL	B-License
2.0	I-License
.	O
</s>
<s>
In	O
BrowserQuest	B-Protocol
,	O
players	O
can	O
interact	O
with	O
each	O
other	O
using	O
the	O
in-game	O
chat	B-Protocol
system	O
,	O
or	O
by	O
working	O
together	O
to	O
defeat	O
enemies	O
.	O
</s>
<s>
Loot	O
includes	O
the	O
invincibility	O
potion	O
,	O
which	O
changes	O
a	O
player	O
's	O
outfit	O
to	O
appear	O
like	O
the	O
Firefox	B-Application
logo	O
,	O
and	O
various	O
gear	O
.	O
</s>
