<s>
DownThemAll	B-Operating_System
!	I-Operating_System
</s>
<s>
(	O
DTA	O
)	O
is	O
a	O
free	B-License
software	I-License
download	B-Protocol
manager	I-Protocol
browser	B-Protocol
extension	I-Protocol
.	O
</s>
<s>
As	O
with	O
any	O
download	B-Protocol
manager	I-Protocol
,	O
the	O
main	O
feature	O
of	O
DTA	O
is	O
multi-part	O
downloading	O
.	O
</s>
<s>
It	O
has	O
Metalink	B-Application
support	O
,	O
which	O
allows	O
multiple	O
URLs	O
for	O
each	O
file	O
to	O
be	O
used	O
,	O
along	O
with	O
checksums	O
and	O
other	O
information	O
about	O
the	O
content	O
.	O
</s>
<s>
Multi-part	O
downloading	O
-	O
also	O
referred	O
to	O
as	O
segmented	O
downloading	O
-	O
is	O
no	O
longer	O
possible	O
with	O
the	O
migration	O
to	O
webextension	B-Operating_System
.	O
</s>
<s>
Other	O
features	O
no	O
longer	O
supported	O
as	O
a	O
web	O
extension	O
are	O
checksum/hash	O
verification	O
,	O
metalinks	B-Application
,	O
and	O
mirror	O
sources	O
.	O
</s>
<s>
When	O
extracting	O
links	O
from	O
a	O
page	O
,	O
the	O
user	O
may	O
choose	O
to	O
download	O
only	O
specific	O
files	O
(	O
for	O
example	O
:	O
all	O
PDFs	B-Application
)	O
using	O
wildcard	B-Algorithm
or	O
regular	B-Language
expression	I-Language
inclusive	O
filters	O
.	O
</s>
<s>
All	O
DTA	O
versions	O
below	O
4.0	O
are	O
incompatible	O
with	O
Firefox	B-Application
57	O
or	O
above	O
(	O
Quantum	O
)	O
.	O
</s>
<s>
DTA	O
4.0	O
moved	O
the	O
codebase	O
from	O
XUL	B-Application
to	O
WebExtensions	B-Operating_System
.	O
</s>
<s>
On	O
September	O
1	O
,	O
2019	O
,	O
DownThemAll	B-Operating_System
!	I-Operating_System
</s>
<s>
On	O
September	O
8	O
,	O
2019	O
,	O
DownThemAll	B-Operating_System
!	I-Operating_System
</s>
<s>
4.0.9	O
was	O
released	O
for	O
Chrome	B-Application
and	O
Opera	B-Application
add-ons	B-Operating_System
.	O
</s>
<s>
DownThemAll	B-Operating_System
!	I-Operating_System
</s>
