<s>
HTTPS	B-Operating_System
Everywhere	I-Operating_System
is	O
a	O
discontinued	O
free	B-License
and	I-License
open-source	I-License
browser	B-Protocol
extension	I-Protocol
for	O
Google	B-Application
Chrome	I-Application
,	O
Microsoft	B-Application
Edge	I-Application
,	O
Mozilla	B-Application
Firefox	I-Application
,	O
Opera	B-Application
,	O
Brave	B-Application
,	O
Vivaldi	B-Language
and	O
Firefox	B-Application
for	I-Application
Android	I-Application
,	O
which	O
is	O
developed	O
collaboratively	O
by	O
The	O
Tor	O
Project	O
and	O
the	O
Electronic	O
Frontier	O
Foundation	O
(	O
EFF	O
)	O
.	O
</s>
<s>
It	O
automatically	O
makes	O
websites	O
use	O
a	O
more	O
secure	O
HTTPS	B-Protocol
connection	O
instead	O
of	O
HTTP	B-Protocol
,	O
if	O
they	O
support	O
it	O
.	O
</s>
<s>
The	O
option	O
"	O
Encrypt	O
All	O
Sites	O
Eligible	O
"	O
makes	O
it	O
possible	O
to	O
block	O
and	O
unblock	O
all	O
non-HTTPS	O
browser	O
connections	O
with	O
one	O
click	O
.	O
</s>
<s>
Due	O
to	O
the	O
widespread	O
adoption	O
of	O
HTTPS	B-Protocol
on	O
the	O
World	O
Wide	O
Web	O
,	O
and	O
the	O
integration	O
of	O
HTTPS-only	O
mode	O
on	O
major	O
browsers	O
,	O
the	O
extension	O
was	O
retired	O
in	O
January	O
2023	O
.	O
</s>
<s>
HTTPS	B-Operating_System
Everywhere	I-Operating_System
was	O
inspired	O
by	O
Google	B-Application
's	I-Application
increased	O
use	O
of	O
HTTPS	B-Protocol
and	O
is	O
designed	O
to	O
force	O
the	O
usage	O
of	O
HTTPS	B-Protocol
automatically	O
whenever	O
possible	O
.	O
</s>
<s>
The	O
code	O
,	O
in	O
part	O
,	O
is	O
based	O
on	O
NoScript	B-Operating_System
's	O
HTTP	B-Protocol
Strict	I-Protocol
Transport	I-Protocol
Security	I-Protocol
implementation	O
,	O
but	O
HTTPS	B-Operating_System
Everywhere	I-Operating_System
is	O
intended	O
to	O
be	O
simpler	O
to	O
use	O
than	O
No	O
Script	O
's	O
forced	O
HTTPS	B-Protocol
functionality	O
which	O
requires	O
the	O
user	O
to	O
manually	O
add	O
websites	O
to	O
a	O
list	O
.	O
</s>
<s>
The	O
EFF	O
provides	O
information	O
for	O
users	O
on	O
how	O
to	O
add	O
HTTPS	B-Protocol
rulesets	O
to	O
HTTPS	B-Operating_System
Everywhere	I-Operating_System
,	O
and	O
information	O
on	O
which	O
websites	O
support	O
HTTPS	B-Protocol
.	O
</s>
<s>
A	O
public	O
beta	O
of	O
HTTPS	B-Operating_System
Everywhere	I-Operating_System
for	O
Firefox	B-Application
was	O
released	O
in	O
2010	O
,	O
and	O
version	O
1.0	O
was	O
released	O
in	O
2011	O
.	O
</s>
<s>
A	O
beta	O
for	O
Chrome	B-Application
was	O
released	O
in	O
February	O
2012	O
.	O
</s>
<s>
In	O
2014	O
,	O
a	O
version	O
was	O
released	O
for	O
Android	B-Application
phones	I-Application
.	O
</s>
<s>
The	O
SSL	B-Operating_System
Observatory	I-Operating_System
is	O
a	O
feature	O
in	O
HTTPS	B-Operating_System
Everywhere	I-Operating_System
introduced	O
in	O
version	O
2.0.1	O
which	O
analyzes	O
public	O
key	O
certificates	O
to	O
determine	O
if	O
certificate	B-Architecture
authorities	I-Architecture
have	O
been	O
compromised	O
,	O
and	O
if	O
the	O
user	O
is	O
vulnerable	O
to	O
man-in-the-middle	O
attacks	O
.	O
</s>
<s>
In	O
2013	O
,	O
the	O
ICANN	B-Application
Security	O
and	O
Stability	O
Advisory	O
Committee	O
(	O
SSAC	O
)	O
noted	O
that	O
the	O
data	B-General_Concept
set	I-General_Concept
used	O
by	O
the	O
SSL	B-Operating_System
Observatory	I-Operating_System
often	O
treated	O
intermediate	O
authorities	O
as	O
different	O
entities	O
,	O
thus	O
inflating	O
the	O
number	O
of	O
certificate	B-Architecture
authorities	I-Architecture
.	O
</s>
<s>
The	O
SSAC	O
criticized	O
SSL	B-Operating_System
Observatory	I-Operating_System
for	O
potentially	O
significantly	O
undercounting	O
internal	O
name	O
certificates	O
,	O
and	O
noted	O
that	O
it	O
used	O
a	O
data	B-General_Concept
set	I-General_Concept
from	O
2010	O
.	O
</s>
<s>
To	O
apply	O
up-to-date	O
https-rules	O
,	O
this	O
update	O
function	O
executes	O
one	O
rule-matching	O
within	O
24	O
hours	O
.	O
</s>
<s>
A	O
website	O
called	O
https-rulesets	O
was	O
built	O
by	O
the	O
EFF	O
for	O
this	O
purpose	O
.	O
</s>
<s>
This	O
automated	O
update	O
function	O
can	O
be	O
disabled	O
in	O
the	O
add-on	B-Operating_System
settings	O
.	O
</s>
<s>
Two	O
studies	O
have	O
recommended	O
building	O
HTTPS	B-Operating_System
Everywhere	I-Operating_System
functionality	O
into	O
Android	B-Application
browsers	O
.	O
</s>
<s>
In	O
2012	O
,	O
Eric	O
Phetteplace	O
described	O
it	O
as	O
"	O
perhaps	O
the	O
best	O
response	O
to	O
Firesheep-style	O
attacks	O
available	O
for	O
any	O
platform	O
"	O
.	O
</s>
<s>
In	O
2011	O
,	O
Vincent	O
Toubiana	O
and	O
Vincent	O
Verdot	O
pointed	O
out	O
some	O
drawbacks	O
of	O
the	O
HTTPS	B-Operating_System
Everywhere	I-Operating_System
add-on	B-Operating_System
,	O
including	O
that	O
the	O
list	O
of	O
services	O
which	O
support	O
HTTPS	B-Protocol
needs	O
maintaining	O
,	O
and	O
that	O
some	O
services	O
are	O
redirected	O
to	O
HTTPS	B-Protocol
even	O
though	O
they	O
are	O
not	O
yet	O
available	O
in	O
HTTPS	B-Protocol
,	O
not	O
allowing	O
the	O
user	O
of	O
the	O
extension	O
to	O
get	O
to	O
the	O
service	O
.	O
</s>
<s>
Other	O
criticisms	O
are	O
that	O
users	O
may	O
be	O
misled	O
to	O
believe	O
that	O
if	O
HTTPS	B-Operating_System
Everywhere	I-Operating_System
does	O
not	O
switch	O
a	O
site	O
to	O
HTTPS	B-Protocol
,	O
it	O
is	O
because	O
it	O
does	O
not	O
have	O
an	O
HTTPS	B-Protocol
version	O
,	O
while	O
it	O
could	O
be	O
that	O
the	O
site	O
manager	O
has	O
not	O
submitted	O
an	O
HTTPS	B-Protocol
ruleset	O
to	O
the	O
EFF	O
,	O
</s>
<s>
and	O
that	O
because	O
the	O
extension	O
sends	O
information	O
about	O
the	O
sites	O
the	O
user	O
visits	O
to	O
the	O
SSL	B-Operating_System
Observatory	I-Operating_System
,	O
this	O
could	O
be	O
used	O
to	O
track	O
the	O
user	O
.	O
</s>
<s>
HTTPS	B-Operating_System
Everywhere	I-Operating_System
initiative	O
inspired	O
opportunistic	B-Protocol
encryption	I-Protocol
alternatives	O
:	O
</s>
