<s>
Mozilla	B-Protocol
Firefox	I-Protocol
3.6	I-Protocol
is	O
a	O
version	O
of	O
the	O
Firefox	B-Application
web	I-Application
browser	I-Application
released	O
in	O
January	O
2010	O
.	O
</s>
<s>
The	O
release	O
's	O
main	O
improvement	O
over	O
Firefox	B-Language
3.5	I-Language
is	O
improved	O
performance	O
(	O
due	O
to	O
further	O
speed	O
improvements	O
in	O
the	O
TraceMonkey	O
JavaScript	B-Language
engine	O
)	O
.	O
</s>
<s>
In	O
this	O
version	O
,	O
support	O
for	O
X	B-Device
BitMap	I-Device
images	O
was	O
dropped	O
.	O
</s>
<s>
This	O
release	O
marked	O
the	O
beginning	O
of	O
a	O
new	O
development	O
cycle	O
for	O
Firefox	B-Application
.	O
</s>
<s>
As	O
well	O
as	O
receiving	O
major	O
updates	O
,	O
the	O
browser	B-Application
also	O
received	O
minor	O
updates	O
with	O
new	O
features	O
.	O
</s>
<s>
It	O
was	O
superseded	O
by	O
Firefox	B-Application
4	I-Application
,	O
released	O
the	O
next	O
year	O
,	O
although	O
Fx	O
3.6	O
had	O
a	O
prolonged	O
period	O
of	O
use	O
and	O
version	O
4	O
had	O
noted	O
user	O
interface	O
changes	O
.	O
</s>
<s>
Firefox	B-Protocol
3.6	I-Protocol
is	O
the	O
last	O
major	O
version	O
of	O
an	O
official	O
Firefox	B-Application
release	O
to	O
run	O
on	O
PowerPC-based	O
Macintoshes	B-Device
(	O
see	O
TenFourFox	B-Operating_System
for	O
a	O
much-more-recent	O
version	O
of	O
Firefox	B-Application
for	O
PowerPC-based	O
computers	O
running	O
Mac	B-Application
OS	I-Application
X	I-Application
)	O
.	O
</s>
<s>
Soon	O
after	O
4	O
,	O
much	O
less	O
weight	O
was	O
given	O
to	O
major	O
version	O
numbers	O
,	O
with	O
6	O
numbers	O
used	O
by	O
September	O
of	O
that	O
year	O
(	O
4	O
,	O
5	O
,	O
6	O
,	O
7	O
,	O
8	O
,	O
and	O
9	O
)	O
compared	O
to	O
3	O
in	O
nearly	O
a	O
decade	O
of	O
Firefox	B-Application
development	O
(	O
1	O
,	O
2	O
and	O
3	O
)	O
.	O
</s>
<s>
Firefox	B-Application
versions	O
4	O
through	O
9	O
had	O
all	O
reached	O
end-of-life	O
status	O
while	O
Mozilla	O
continued	O
supporting	O
Firefox	B-Protocol
3.6	I-Protocol
with	O
security	O
updates	O
.	O
</s>
<s>
Coinciding	O
with	O
a	O
proposal	O
to	O
cater	O
to	O
Enterprise	O
users	O
with	O
optional	O
Extended	O
Support	O
Releases	O
beginning	O
in	O
2012	O
based	O
upon	O
Firefox	B-Application
10	O
,	O
Mozilla	O
discontinued	O
support	O
for	O
Firefox	B-Protocol
3.6	I-Protocol
on	O
April	O
24	O
,	O
2012	O
with	O
automatic	O
update	O
to	O
Firefox	B-Application
12	O
pushed	O
out	O
to	O
compatible	O
devices	O
by	O
June	O
2012	O
.	O
</s>
<s>
The	O
Firefox	B-Application
developers	O
created	O
a	O
new	O
feature	O
called	O
Lorentz	O
.	O
</s>
<s>
The	O
Windows	B-Application
and	O
Linux	B-Application
versions	O
incorporate	O
out-of-process	O
plug-ins	O
(	O
OOPP	O
)	O
,	O
which	O
isolates	O
execution	O
of	O
plug-ins	O
(	O
Adobe	O
Flash	O
,	O
Apple	O
QuickTime	O
and	O
Microsoft	O
Silverlight	O
by	O
default	O
)	O
into	O
a	O
separate	O
process	O
.	O
</s>
<s>
This	O
significantly	O
reduces	O
the	O
number	O
of	O
Firefox	B-Application
crashes	O
experienced	O
by	O
users	O
who	O
are	O
watching	O
online	O
videos	O
or	O
playing	O
games	O
;	O
the	O
user	O
can	O
simply	O
refresh	O
the	O
page	O
to	O
continue	O
.	O
</s>
<s>
Mozilla	O
states	O
that	O
30%	O
of	O
browser	B-Application
crashes	O
are	O
caused	O
by	O
third-party	O
plugins	O
.	O
</s>
<s>
Support	O
for	O
other	O
plug-ins	O
by	O
default	O
in	O
OOPP	O
and	O
on	O
the	O
Mac	B-Application
OS	I-Application
X	I-Application
platform	O
became	O
available	O
in	O
Firefox	B-Application
4	I-Application
.	O
</s>
<s>
Plug-in	O
directory	O
lock	O
down	O
:	O
Plugins	O
may	O
only	O
to	O
be	O
installed	O
using	O
a	O
.xpi	O
file	O
,	O
not	O
through	O
mere	O
copying	O
to	O
the	O
Firefox	B-Application
plugin	O
directory	O
.	O
</s>
<s>
Mozilla	O
discontinued	O
support	O
for	O
Firefox	B-Protocol
3.6	I-Protocol
on	O
April	O
24	O
,	O
2012	O
,	O
which	O
at	O
over	O
27	O
months	O
of	O
support	O
made	O
it	O
the	O
longest	O
supported	O
version	O
of	O
Firefox	B-Application
,	O
even	O
longer	O
than	O
Firefox	B-Language
2	I-Language
which	O
had	O
over	O
26	O
months	O
of	O
total	O
support	O
itself	O
.	O
</s>
<s>
The	O
underlying	O
Gecko	O
1.9.2	O
engine	O
continued	O
to	O
be	O
used	O
,	O
with	O
updates	O
,	O
in	O
Camino	B-Language
.	O
</s>
