<s>
Vivaldi	B-Language
(	O
)	O
is	O
a	O
freeware	B-License
,	O
cross-platform	B-Operating_System
web	B-Application
browser	I-Application
with	O
a	O
built-in	O
email	B-Protocol
client	I-Protocol
developed	O
by	O
Vivaldi	B-Language
Technologies	O
,	O
a	O
company	O
founded	O
by	O
Tatsuki	O
Tomita	O
and	O
Jon	O
Stephenson	O
von	O
Tetzchner	O
,	O
who	O
was	O
the	O
co-founder	O
and	O
CEO	O
of	O
Opera	B-Application
Software	O
.	O
</s>
<s>
Vivaldi	B-Language
was	O
officially	O
launched	O
on	O
April	O
6	O
,	O
2016	O
.	O
</s>
<s>
Although	O
intended	O
for	O
general	O
users	O
,	O
it	O
is	O
first	O
and	O
foremost	O
targeted	O
towards	O
technically-inclined	O
users	O
as	O
well	O
as	O
former	O
Opera	B-Application
users	O
disgruntled	O
by	O
its	O
transition	O
from	O
the	O
Presto	B-Application
layout	I-Application
engine	I-Application
to	O
a	O
Chromium-based	O
browser	B-Application
that	O
resulted	O
in	O
the	O
loss	O
of	O
many	O
of	O
its	O
iconic	O
features	O
.	O
</s>
<s>
Despite	O
also	O
being	O
Chromium-based	O
,	O
Vivaldi	B-Language
aims	O
to	O
revive	O
the	O
features	O
of	O
the	O
Presto-based	O
Opera	B-Application
with	O
its	O
own	O
proprietary	B-Application
modifications	O
.	O
</s>
<s>
Vivaldi	B-Language
released	O
a	O
mobile	O
(	O
Android	O
)	O
beta	O
version	O
on	O
September	O
6	O
,	O
2019	O
,	O
and	O
a	O
regular	O
release	O
on	O
April	O
22	O
,	O
2020	O
.	O
</s>
<s>
,	O
Vivaldi	B-Language
has	O
more	O
than	O
2.4	O
million	O
active	O
users	O
.	O
</s>
<s>
Vivaldi	B-Language
began	O
as	O
a	O
virtual	B-Architecture
community	I-Architecture
website	O
that	O
replaced	O
My	B-Protocol
Opera	I-Protocol
,	O
which	O
was	O
shut	O
down	O
by	O
Opera	B-Application
Software	O
in	O
March	O
2014	O
.	O
</s>
<s>
Jon	O
Stephenson	O
von	O
Tetzchner	O
was	O
angered	O
by	O
this	O
decision	O
because	O
he	O
believed	O
that	O
this	O
community	O
helped	O
make	O
the	O
Opera	B-Application
web	I-Application
browser	I-Application
what	O
it	O
was	O
.	O
</s>
<s>
Tetzchner	O
then	O
launched	O
the	O
Vivaldi	B-Language
Community	O
—	O
a	O
virtual	B-Architecture
community	I-Architecture
focused	O
on	O
providing	O
registered	O
users	O
with	O
a	O
discussion	B-Application
forum	I-Application
,	O
blogging	O
service	O
,	O
and	O
numerous	O
other	O
practical	O
web	O
services	O
—	O
to	O
make	O
up	O
for	O
My	B-Protocol
Opera	I-Protocol
's	O
closure	O
.	O
</s>
<s>
Later	O
,	O
on	O
January	O
27	O
,	O
2015	O
,	O
Vivaldi	B-Language
Technologies	O
launched	O
the	O
first	O
technical	O
preview	O
of	O
the	O
Vivaldi	B-Language
web	I-Language
browser	I-Language
.	O
</s>
<s>
Its	O
name	O
comes	O
from	O
the	O
Italian	O
composer	O
Antonio	O
Vivaldi	B-Language
,	O
which	O
,	O
according	O
to	O
one	O
of	O
its	O
creators	O
,	O
is	O
an	O
easy	O
name	O
to	O
be	O
remembered	O
and	O
understood	O
worldwide	O
.	O
</s>
<s>
In	O
September	O
2021	O
,	O
Vivaldi	B-Language
replaced	O
Firefox	B-Application
as	O
the	O
default	O
browser	B-Application
on	O
the	O
Manjaro	B-Application
Cinnamon	O
Community	O
Edition	O
,	O
the	O
decision	O
its	O
developers	O
cited	O
on	O
its	O
feature-richness	O
and	O
exceptional	O
customisability	O
.	O
</s>
<s>
In	O
December	O
2021	O
,	O
Vivaldi	B-Language
became	O
the	O
first	O
web	B-Application
browser	I-Application
to	O
be	O
available	O
for	O
the	O
Android	B-Application
Automotive	I-Application
operating	O
system	O
used	O
in	O
the	O
Swedish	O
electric	O
vehicle	O
manufacturer	O
Polestar	O
's	O
Polestar	O
2	O
.	O
</s>
<s>
For	O
safety	O
purposes	O
,	O
the	O
browser	B-Application
can	O
only	O
be	O
used	O
when	O
the	O
car	O
is	O
parked	O
.	O
</s>
<s>
Automatically	O
fetch	O
Widevine	O
(	O
EME	O
)	O
,	O
to	O
enable	O
Netflix	O
,	O
Amazon	B-Application
Prime	I-Application
Video	I-Application
,	O
etc	O
.	O
</s>
<s>
Vivaldi	B-Language
has	O
a	O
minimalistic	O
user	B-Application
interface	I-Application
with	O
basic	O
icons	O
and	O
fonts	O
,	O
and	O
,	O
optionally	O
,	O
a	O
colour	O
scheme	O
that	O
changes	O
based	O
on	O
the	O
background	O
and	O
design	O
of	O
the	O
web	O
page	O
being	O
visited	O
.	O
</s>
<s>
The	O
browser	B-Application
also	O
allows	O
users	O
to	O
customise	O
the	O
appearance	O
of	O
UI	B-Application
elements	O
such	O
as	O
background	O
colour	O
,	O
overall	O
theme	O
,	O
address	O
bar	O
and	O
tab	O
positioning	O
,	O
and	O
start	O
pages	O
.	O
</s>
<s>
According	O
to	O
CEO	O
Jon	O
von	O
Tetzchner	O
,	O
Vivaldi	B-Language
's	O
unique	O
customisability	O
is	O
how	O
the	O
browser	B-Application
caters	O
to	O
experienced	O
users	O
.	O
</s>
<s>
Vivaldi	B-Language
comes	O
with	O
built-in	O
ad	O
blocker	O
,	O
pop	O
up	O
blocker	O
and	O
tracker	O
blocker	O
.	O
</s>
<s>
It	O
comes	O
with	O
built-in	O
e-mail	B-Protocol
client	I-Protocol
with	O
IMAP	B-Protocol
and	O
POP3	B-Protocol
support	O
.	O
</s>
<s>
The	O
browser	B-Application
can	O
be	O
used	O
as	O
a	O
feed	O
reader	O
to	O
save	O
RSS	O
and	O
Atom	B-Application
feeds	I-Application
.	O
</s>
<s>
It	O
also	O
comes	O
with	O
built-in	O
Vivaldi	B-Language
Calendar	O
to	O
manage	O
events	O
in	O
the	O
browser	B-Application
.	O
</s>
<s>
Vivaldi	B-Language
Translate	O
is	O
powered	O
by	O
Lingvanex	O
and	O
can	O
instantly	O
translate	O
websites	O
,	O
without	O
the	O
need	O
for	O
third-party	O
extensions	O
.	O
</s>
<s>
Vivaldi	B-Language
features	O
the	O
ability	O
to	O
"	O
stack	O
"	O
and	O
"	O
tile	O
"	O
tabs	O
,	O
annotate	O
web	O
pages	O
,	O
and	O
add	O
notes	O
to	O
bookmarks	O
.	O
</s>
<s>
Furthermore	O
,	O
users	O
can	O
place	O
digital	O
bookmarks	O
on	O
a	O
"	O
speed	O
dial	O
"	O
page	O
for	O
quick	O
access	O
and	O
harness	O
"	O
quick	O
commands	O
"	O
to	O
search	O
bookmarks	O
,	O
browsing	B-Protocol
history	I-Protocol
,	O
open	O
tabs	O
,	O
and	O
settings	O
.	O
</s>
<s>
Vivaldi	B-Language
is	O
built	O
around	O
and	O
based	O
on	O
web	O
technologies	O
such	O
as	O
HTML5	B-Application
,	O
Node.js	B-Language
,	O
React.js	B-Application
,	O
and	O
numerous	O
NPM	B-Language
modules	O
.	O
</s>
<s>
As	O
of	O
Technical	O
Preview	O
4	O
,	O
Vivaldi	B-Language
also	O
supports	O
numerous	O
mouse	O
gestures	O
for	O
actions	O
like	O
tab	O
switching	O
and	O
keyboard	O
activation	O
.	O
</s>
<s>
Vivaldi	B-Language
can	O
also	O
be	O
set	O
to	O
a	O
"	O
Chromeless	O
UI	B-Application
"	O
,	O
which	O
gives	O
users	O
more	O
screen	O
real-estate	O
and	O
the	O
ability	O
to	O
focus	O
on	O
a	O
single	O
page	O
without	O
distractions	O
.	O
</s>
<s>
To	O
accommodate	O
users	O
who	O
prefer	O
to	O
use	O
a	O
large	O
number	O
of	O
tabs	O
at	O
the	O
same	O
time	O
,	O
Vivaldi	B-Language
supports	O
hibernation	O
for	O
both	O
individual	O
tabs	O
and	O
for	O
tab	O
stacks	O
,	O
freeing	O
resources	O
while	O
the	O
user	O
does	O
not	O
actively	O
use	O
those	O
tabs	O
.	O
</s>
<s>
Vivaldi	B-Language
can	O
use	O
many	O
browser	B-Protocol
extensions	I-Protocol
developed	O
for	O
Google	B-Application
Chrome	I-Application
and	O
Firefox	B-Application
(	O
they	O
use	O
common	O
WebExtensions	O
API	B-General_Concept
)	O
,	O
and	O
users	O
can	O
install	O
extensions	O
directly	O
from	O
the	O
Chrome	B-Application
Web	I-Application
Store	I-Application
.	O
</s>
<s>
Most	O
of	O
these	O
work	O
properly	O
in	O
Vivaldi	B-Language
,	O
with	O
the	O
exception	O
of	O
user	B-Application
interface	I-Application
customisations	O
due	O
to	O
its	O
visual	O
changes	O
to	O
the	O
Chromium	B-Language
source	O
code	O
.	O
</s>
<s>
Starting	O
with	O
version	O
2.10	O
,	O
Vivaldi	B-Language
changed	O
its	O
user	B-Protocol
agent	I-Protocol
string	O
to	O
mimic	O
a	O
generic	O
build	O
of	O
Chromium	B-Language
,	O
which	O
results	O
in	O
it	O
not	O
being	O
recorded	O
as	O
a	O
unique	O
browser	B-Application
and	O
causing	O
a	O
decrease	O
in	O
its	O
recorded	O
market	O
share	O
.	O
</s>
<s>
He	O
praised	O
its	O
innovative	O
features	O
,	O
such	O
as	O
its	O
tab	O
handling	O
,	O
while	O
noting	O
that	O
it	O
will	O
most	O
likely	O
remain	O
a	O
niche	O
browser	B-Application
and	O
not	O
see	O
widespread	O
uptake	O
.	O
</s>
<s>
In	O
October	O
2018	O
,	O
Gilbertson	O
gave	O
version	O
2.0	O
a	O
very	O
positive	O
review	O
and	O
stated	O
that	O
Vivaldi	B-Language
is	O
now	O
his	O
usual	O
browser	B-Application
and	O
that	O
he	O
would	O
be	O
hard	O
put	O
to	O
go	O
back	O
to	O
a	O
browser	B-Application
without	O
its	O
unique	O
features	O
.	O
</s>
<s>
Ghacks	O
editor-in-chief	O
Martin	O
Brinkmann	O
wrote	O
about	O
the	O
privacy	O
of	O
Vivaldi	B-Language
in	O
January	O
2018	O
.	O
</s>
<s>
He	O
criticised	O
the	O
lack	O
of	O
an	O
opt-out	O
option	O
for	O
the	O
unique	O
user	O
ID	O
it	O
generates	O
to	O
get	O
general	O
statistics	O
about	O
the	O
browser	B-Application
's	O
userbase	O
,	O
but	O
commented	O
that	O
the	O
unique	O
ID	O
"	O
is	O
easy	O
enough	O
to	O
delete	O
"	O
and	O
"	O
it	O
is	O
different	O
anyway	O
if	O
you	O
use	O
Vivaldi	B-Language
on	O
multiple	O
devices	O
"	O
.	O
</s>
