<s>
Fire	B-Application
OS	I-Application
is	O
a	O
mobile	B-Operating_System
operating	I-Operating_System
system	I-Operating_System
based	O
on	O
Android	B-Application
Open	B-Application
Source	I-Application
Project	O
(	O
AOSP	O
)	O
source	O
code	O
.	O
</s>
<s>
It	O
is	O
developed	O
by	O
Amazon	B-Application
for	O
their	O
devices	O
.	O
</s>
<s>
Fire	B-Application
OS	I-Application
includes	O
proprietary	B-Application
software	I-Application
,	O
a	O
customized	O
user	B-Application
interface	I-Application
primarily	O
centered	O
on	O
content	O
consumption	O
,	O
and	O
heavy	O
ties	O
to	O
content	O
available	O
from	O
Amazon	B-Application
's	O
storefronts	O
and	O
services	O
.	O
</s>
<s>
Amazon	B-Application
began	O
referring	O
to	O
the	O
Android	B-Application
derivative	O
as	O
Fire	B-Application
OS	I-Application
with	O
its	O
third	O
iteration	O
of	O
Fire	B-Application
tablets	I-Application
.	O
</s>
<s>
Unlike	O
previous	O
Fire	O
models	O
,	O
whose	O
operating	O
system	O
was	O
described	O
as	O
"	O
based	O
on	O
"	O
Android	B-Application
,	O
Fire	B-Application
OS	I-Application
3.0	O
was	O
described	O
as	O
"	O
compatible	O
with	O
"	O
Android	B-Application
.	O
</s>
<s>
Based	O
on	O
Android	B-Application
5.1	I-Application
"	I-Application
Lollipop	I-Application
"	I-Application
,	O
it	O
added	O
an	O
updated	O
interface	O
.	O
</s>
<s>
It	O
removed	O
support	O
for	O
device	O
encryption	O
,	O
which	O
an	O
Amazon	B-Application
spokesperson	O
stated	O
was	O
an	O
enterprise-oriented	O
feature	O
that	O
was	O
underused	O
.	O
</s>
<s>
In	O
March	O
2016	O
,	O
after	O
the	O
removal	O
was	O
publicized	O
and	O
criticized	O
in	O
the	O
wake	O
of	O
the	O
FBI	O
–	O
Apple	O
encryption	O
dispute	O
,	O
Amazon	B-Application
announced	O
it	O
would	O
restore	O
the	O
feature	O
in	O
a	O
future	O
patch	O
.	O
</s>
<s>
Based	O
on	O
Android	B-Application
7.1.2	I-Application
"	I-Application
Nougat	I-Application
"	I-Application
,	O
its	O
main	O
changes	O
and	O
additions	O
include	O
:	O
</s>
<s>
In	O
early	O
2019	O
,	O
security	O
exploits	O
for	O
six	O
Fire	B-Application
Tablet	I-Application
models	O
and	O
one	O
Fire	B-Application
TV	I-Application
model	O
were	O
discovered	O
that	O
could	O
allow	O
temporary	O
root	B-Application
access	I-Application
,	O
permanent	O
root	B-Application
access	I-Application
,	O
and	O
bootloader	B-Application
unlocking	I-Application
due	O
to	O
security	O
vulnerabilities	O
in	O
multiple	O
MediaTek	B-Architecture
chipsets	O
.	O
</s>
<s>
Based	O
on	O
Android	B-Application
9.0	I-Application
"	I-Application
Pie	I-Application
"	I-Application
,	O
it	O
was	O
released	O
in	O
2019	O
for	O
all	O
8th-11th	O
generation	O
Fire	B-Application
tablets	I-Application
.	O
</s>
<s>
In	O
February	O
2022	O
,	O
Amazon	B-Application
announced	O
that	O
the	O
Docs	O
app	O
would	O
be	O
replaced	O
(	O
in	O
August	O
2022	O
)	O
by	O
document	O
creation	O
functionality	O
in	O
the	O
Files	O
app	O
;	O
and	O
introduced	O
an	O
improved	O
home	O
editing	O
system	O
.	O
</s>
<s>
FireOS	B-Application
8	O
is	O
the	O
latest	O
release	O
of	O
FireOS	B-Application
for	O
the	O
12th	O
generation	O
Fire	O
7	O
,	O
based	O
on	O
Android	B-Application
11	I-Application
,	O
information	O
about	O
the	O
release	O
became	O
available	O
via	O
Amazon	B-Application
developer	O
documentation	O
around	O
May	O
2022	O
.	O
</s>
<s>
FireOS	B-Application
8	O
incorporates	O
changes	O
from	O
Android	B-Application
10	I-Application
and	O
Android	B-Application
11	I-Application
,	O
although	O
it	O
is	O
noted	O
in	O
the	O
Amazon	B-Application
developer	O
documentation	O
that	O
some	O
Android	B-Application
11	I-Application
features	O
such	O
as	O
File	O
Based	O
Encryption	O
(	O
FBE	O
)	O
are	O
not	O
supported	O
yet	O
,	O
</s>
<s>
Some	O
of	O
the	O
new	O
changes	O
in	O
FireOS	B-Application
8	O
include	O
:	O
</s>
<s>
Fire	B-Application
OS	I-Application
does	O
not	O
come	O
with	O
Google	B-Application
mobile	I-Application
services	I-Application
pre-installed	O
;	O
therefore	O
,	O
Amazon	B-Application
cannot	O
use	O
the	O
Android	B-Application
trademarks	O
to	O
market	O
the	O
devices	O
.	O
</s>
<s>
Users	O
are	O
able	O
to	O
sideload	B-Protocol
the	B-Application
Google	I-Application
Play	O
store	O
however	O
,	O
full	O
compatibility	O
is	O
not	O
guaranteed	O
if	O
the	O
app	O
depends	O
on	O
Google	B-Application
services	O
.	O
</s>
<s>
Because	O
Google	B-Application
services	O
are	O
not	O
pre-installed	O
,	O
Amazon	B-Application
develops	O
and	O
uses	O
its	O
own	O
apps	O
in	O
their	O
place	O
,	O
some	O
of	O
which	O
include	O
Amazon	B-Application
Appstore	O
,	O
Amazon	B-Application
Alexa	I-Application
,	O
Prime	B-Application
Video	I-Application
,	O
Amazon	B-Application
Music	I-Application
,	O
Audible	B-Application
,	O
Kindle	O
Store	O
,	O
Silk	B-Protocol
Browser	I-Protocol
,	O
Goodreads	B-Application
and	O
Here	B-Application
WeGo	I-Application
.	O
</s>
<s>
Fire	B-Application
OS	I-Application
uses	O
a	O
customized	O
home	O
screen	O
(	O
launcher	B-Application
)	O
.	O
</s>
<s>
As	O
of	O
Fire	B-Application
OS	I-Application
7.3.2.3	O
,	O
the	O
launcher	B-Application
features	O
three	O
sections	O
:	O
</s>
<s>
"	O
For	O
You	O
"	O
shows	O
the	O
weather	O
,	O
recently	O
used	O
apps	O
,	O
Alexa	B-Application
integration	O
,	O
then	O
shows	O
recommended	O
content	O
such	O
as	O
apps	O
,	O
books	O
movies	O
,	O
etc	O
.	O
</s>
<s>
"	O
Home	O
"	O
is	O
the	O
section	O
for	O
the	O
icons	O
of	O
all	O
of	O
the	O
apps	O
currently	O
installed	O
on	O
the	O
device	O
,	O
apps	O
on	O
the	O
Home	O
section	O
can	O
be	O
moved	O
around	O
or	O
put	O
into	O
folders	O
,	O
a	O
search	O
bar	O
is	O
also	O
available	O
at	O
the	O
top	O
of	O
the	O
launcher	B-Application
to	O
search	O
though	O
local	O
content	O
on	O
the	O
device	O
or	O
search	O
online	O
using	O
the	O
Bing	B-Application
search	I-Application
engine	I-Application
.	O
</s>
<s>
The	O
OS	O
features	O
a	O
multi-user	B-Operating_System
system	I-Operating_System
,	O
which	O
allows	O
multiple	O
people	O
to	O
setup	O
and	O
use	O
separate	O
user	O
profiles	O
.	O
</s>
<s>
Along	O
with	O
Amazon	B-Application
Kids	O
and	O
Amazon	B-Application
Kids+	O
,	O
a	O
suite	O
of	O
parental	O
controls	O
is	O
included	O
which	O
allows	O
parents	O
to	O
create	O
managed	O
child	O
profiles	O
,	O
set	O
limits	O
and	O
set	O
restrictions	O
for	O
minors	O
.	O
</s>
<s>
Current	O
Amazon	B-Application
devices	O
running	O
Fire	B-Application
OS	I-Application
:	O
</s>
<s>
Discontinued	O
devices	O
running	O
Fire	B-Application
OS	I-Application
:	O
</s>
<s>
The	O
releases	O
are	O
categorized	O
by	O
major	O
Fire	B-Application
OS	I-Application
versions	O
based	O
upon	O
a	O
certain	O
Android	B-Application
codebase	B-General_Concept
first	O
and	O
then	O
sorted	O
chronologically	O
.	O
</s>
<s>
Fire	B-Application
OS	I-Application
2.4	O
–	O
based	O
on	O
Android	O
4.0.3(? )	O
</s>
<s>
5.6.3.0	O
–	O
November	O
2018	O
:	O
for	O
Fire	O
7	O
(	O
5th	O
to	O
7th	O
Generation	O
)	O
;	O
Due	O
to	O
a	O
mistake	O
,	O
this	O
version	O
was	O
accidentally	O
released	O
as	O
5.3.6.4	O
on	O
some	O
Fire	B-Application
tablets	I-Application
instead	O
of	O
5.6.3.0	O
,	O
but	O
includes	O
the	O
same	O
update	O
features	O
.	O
</s>
