URL: https://esplanade.sk/
Submission: On July 07 via api from US — Scanned from DE

Summary

This website contacted 4 IPs in 2 countries across 3 domains to perform 11 HTTP transactions. The main IP is 2a00:4b40:aaaa:2008::7, located in Slovakia and belongs to WEBSUPPORT-SRO-SK-AS, SK. The main domain is esplanade.sk.
TLS certificate: Issued by R11 on June 15th 2024. Valid for: 3 months.
This is the only time esplanade.sk was scanned on urlscan.io!

urlscan.io Verdict: No classification

Domain & IP information

IP Address AS Autonomous System
5 2a00:4b40:aaa... 51013 (WEBSUPPOR...)
1 2a00:1450:400... 15169 (GOOGLE)
3 37.9.175.189 51013 (WEBSUPPOR...)
2 2a00:1450:400... 15169 (GOOGLE)
11 4
Apex Domain
Subdomains
Transfer
8 esplanade.sk
esplanade.sk
222 KB
2 gstatic.com
fonts.gstatic.com
82 KB
1 googleapis.com
fonts.googleapis.com — Cisco Umbrella Rank: 87
2 KB
11 3
Domain Requested by
8 esplanade.sk esplanade.sk
2 fonts.gstatic.com fonts.googleapis.com
1 fonts.googleapis.com esplanade.sk
11 3

This site contains links to these domains. Also see Links.

Domain
www.nehnutelnosti.sk
www.orsr.sk
Subject Issuer Validity Valid
esplanade.sk
R11
2024-06-15 -
2024-09-13
3 months crt.sh
upload.video.google.com
WR2
2024-06-13 -
2024-09-05
3 months crt.sh
*.gstatic.com
WR2
2024-06-13 -
2024-09-05
3 months crt.sh

This page contains 1 frames:

Primary Page: https://esplanade.sk/
Frame ID: B30C9F4865C8D236AFAD9988039273BC
Requests: 11 HTTP requests in this frame

Screenshot

Page Title

Kontakt - Esplanade

Detected technologies

Overall confidence: 100%
Detected patterns
  • <link rel=["']stylesheet["'] [^>]+/wp-(?:content|includes)/
  • /wp-(?:content|includes)/

Overall confidence: 100%
Detected patterns
  • <link[^>]* href=[^>]+fonts\.(?:googleapis|google)\.com

Page Statistics

11
Requests

100 %
HTTPS

75 %
IPv6

3
Domains

3
Subdomains

4
IPs

2
Countries

306 kB
Transfer

439 kB
Size

0
Cookies

Redirected requests

There were HTTP redirect chains for the following requests:

11 HTTP transactions

Resource
Path
Size
x-fer
Type
MIME-Type
Primary Request /
esplanade.sk/
11 KB
4 KB
Document
General
Full URL
https://esplanade.sk/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a00:4b40:aaaa:2008::7 , Slovakia, ASN51013 (WEBSUPPORT-SRO-SK-AS, SK),
Reverse DNS
Software
openresty / W3 Total Cache/0.9.4.1
Resource Hash
45b5ae464270a4a59adc1c06f8cee14c3fe9b8545abb0d37adb99bf05b54a5ec

Request headers

Accept-Language
de-DE,de;q=0.9;q=0.9
Upgrade-Insecure-Requests
1
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36
sec-ch-ua
"Google Chrome";v="126", "Not:A-Brand";v="8", "Chromium";v="126"
sec-ch-ua-mobile
?0
sec-ch-ua-platform
"Win32"

Response headers

alt-svc
h3=":443"; ma=86400
cache-control
max-age=3600, public
content-encoding
gzip
content-type
text/html; charset=UTF-8
date
Sun, 07 Jul 2024 11:03:34 GMT
etag
6ad07291d52cfc88b348fb90740c361e
expires
Sun, 07 Jul 2024 12:03:34 GMT
last-modified
Sun, 07 Jul 2024 11:03:34 GMT
link
<https://esplanade.sk/wp-json/>; rel="https://api.w.org/" <https://esplanade.sk/>; rel=shortlink
pragma
public
server
openresty
vary
Accept-Encoding Accept-Encoding,User-Agent
x-powered-by
W3 Total Cache/0.9.4.1
M9DPLyjILyopzUvVTy4u1k_Kzy8pLilKLNDLzczTMUCSLS6pzEkFAA.css
esplanade.sk/wp-content/cache/minify/000000/
48 KB
10 KB
Stylesheet
General
Full URL
https://esplanade.sk/wp-content/cache/minify/000000/M9DPLyjILyopzUvVTy4u1k_Kzy8pLilKLNDLzczTMUCSLS6pzEkFAA.css
Requested by
Host: esplanade.sk
URL: https://esplanade.sk/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a00:4b40:aaaa:2008::7 , Slovakia, ASN51013 (WEBSUPPORT-SRO-SK-AS, SK),
Reverse DNS
Software
openresty / W3 Total Cache/0.9.4.1
Resource Hash
b5baf4009b44fe8f56aff8e4302169265ee5a14ce77c35c718e3a095767894d6

Request headers

sec-ch-ua
"Google Chrome";v="126", "Not:A-Brand";v="8", "Chromium";v="126"
Referer
https://esplanade.sk/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

pragma
public
date
Sun, 07 Jul 2024 11:03:34 GMT
content-encoding
gzip
last-modified
Wed, 27 Jan 2016 23:44:43 GMT
server
openresty
x-powered-by
W3 Total Cache/0.9.4.1
etag
"pub1453938283;gz"
vary
Accept-Encoding, Accept-Encoding,User-Agent
content-type
text/css; charset=utf-8
cache-control
max-age=31536000, public
alt-svc
h3=":443"; ma=86400
content-length
10222
expires
Mon, 07 Jul 2025 11:03:34 GMT
css
fonts.googleapis.com/
27 KB
2 KB
Stylesheet
General
Full URL
https://fonts.googleapis.com/css?family=Open+Sans%3A300%2C400%2C600%2C700%2C800&subset=latin%2Clatin-ext
Requested by
Host: esplanade.sk
URL: https://esplanade.sk/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a00:1450:4001:81d::200a Frankfurt am Main, Germany, ASN15169 (GOOGLE, US),
Reverse DNS
Software
ESF /
Resource Hash
6953682c0ea668bba8f2d7259f4227f9edc14e69115084b7d9b7f32a177513b8
Security Headers
Name Value
Strict-Transport-Security max-age=31536000
X-Content-Type-Options nosniff
X-Frame-Options SAMEORIGIN
X-Xss-Protection 0

Request headers

sec-ch-ua
"Google Chrome";v="126", "Not:A-Brand";v="8", "Chromium";v="126"
Referer
https://esplanade.sk/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

strict-transport-security
max-age=31536000
date
Sun, 07 Jul 2024 11:03:34 GMT
content-encoding
gzip
x-content-type-options
nosniff
cross-origin-resource-policy
cross-origin
alt-svc
h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
x-xss-protection
0
last-modified
Sun, 07 Jul 2024 10:26:52 GMT
server
ESF
cross-origin-opener-policy
same-origin-allow-popups
x-frame-options
SAMEORIGIN
content-type
text/css; charset=utf-8
access-control-allow-origin
*
cache-control
private, max-age=86400, stale-while-revalidate=604800
timing-allow-origin
*
link
<https://fonts.gstatic.com>; rel=preconnect; crossorigin
expires
Sun, 07 Jul 2024 11:03:34 GMT
M9bPKixNLarUMYYydHMz04sSS1L1cjPzAA.js
esplanade.sk/wp-content/cache/minify/000000/
101 KB
35 KB
Script
General
Full URL
https://esplanade.sk/wp-content/cache/minify/000000/M9bPKixNLarUMYYydHMz04sSS1L1cjPzAA.js
Requested by
Host: esplanade.sk
URL: https://esplanade.sk/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a00:4b40:aaaa:2008::7 , Slovakia, ASN51013 (WEBSUPPORT-SRO-SK-AS, SK),
Reverse DNS
Software
openresty / W3 Total Cache/0.9.4.1
Resource Hash
6608bb33fa3136cc13fd63f7c803019a754a2f86bcb54d916225b486247d11e7

Request headers

sec-ch-ua
"Google Chrome";v="126", "Not:A-Brand";v="8", "Chromium";v="126"
Referer
https://esplanade.sk/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

pragma
public
date
Sun, 07 Jul 2024 11:03:34 GMT
content-encoding
gzip
last-modified
Tue, 12 Jan 2016 09:21:04 GMT
server
openresty
x-powered-by
W3 Total Cache/0.9.4.1
etag
"pub1452590464;gz"
vary
Accept-Encoding, Accept-Encoding,User-Agent
content-type
application/x-javascript; charset=utf-8
cache-control
max-age=31536000, public
alt-svc
h3=":443"; ma=86400
content-length
35726
expires
Mon, 07 Jul 2025 11:03:34 GMT
esplanade-facebook-cover-photo-jpg-%E2%80%93-k%C3%B3pia.jpg
esplanade.sk/wp-content/uploads/2016/01/
3 KB
3 KB
Image
General
Full URL
https://esplanade.sk/wp-content/uploads/2016/01/esplanade-facebook-cover-photo-jpg-%E2%80%93-k%C3%B3pia.jpg
Requested by
Host: esplanade.sk
URL: https://esplanade.sk/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a00:4b40:aaaa:2008::7 , Slovakia, ASN51013 (WEBSUPPORT-SRO-SK-AS, SK),
Reverse DNS
Software
openresty / W3 Total Cache/0.9.4.1
Resource Hash
eadbe631701fa27770928fa07b979492eb55ae1da0d124e4a3737690aa3c2721

Request headers

sec-ch-ua
"Google Chrome";v="126", "Not:A-Brand";v="8", "Chromium";v="126"
Referer
https://esplanade.sk/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

pragma
public
date
Sun, 07 Jul 2024 11:03:34 GMT
last-modified
Thu, 28 Jan 2016 00:28:01 GMT
server
openresty
etag
"b74-52a59fdc0b588"
x-powered-by
W3 Total Cache/0.9.4.1
vary
User-Agent
content-type
image/jpeg
cache-control
max-age=31536000, public
accept-ranges
bytes
alt-svc
h3=":443"; ma=86400
content-length
2932
expires
Mon, 07 Jul 2025 11:03:34 GMT
cropped-fp-banner.jpg
esplanade.sk/wp-content/uploads/2016/01/
165 KB
166 KB
Image
General
Full URL
https://esplanade.sk/wp-content/uploads/2016/01/cropped-fp-banner.jpg
Requested by
Host: esplanade.sk
URL: https://esplanade.sk/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a00:4b40:aaaa:2008::7 , Slovakia, ASN51013 (WEBSUPPORT-SRO-SK-AS, SK),
Reverse DNS
Software
openresty / W3 Total Cache/0.9.4.1
Resource Hash
be987ed5101c9731415adfc821376df28125d6f2372a114a9b1e12240eee1707

Request headers

sec-ch-ua
"Google Chrome";v="126", "Not:A-Brand";v="8", "Chromium";v="126"
Referer
https://esplanade.sk/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

pragma
public
date
Sun, 07 Jul 2024 11:03:34 GMT
last-modified
Thu, 28 Jan 2016 00:21:23 GMT
server
openresty
etag
"29444-52a59e60836d0"
x-powered-by
W3 Total Cache/0.9.4.1
vary
User-Agent
content-type
image/jpeg
cache-control
max-age=31536000, public
accept-ranges
bytes
alt-svc
h3=":443"; ma=86400
content-length
169028
expires
Mon, 07 Jul 2025 11:03:34 GMT
M9DPLyjILyopzUvVzyrWL87OLNDNyczL1k3LTy4t1k3LrAAA.js
esplanade.sk/wp-content/cache/minify/000000/
586 B
617 B
Script
General
Full URL
https://esplanade.sk/wp-content/cache/minify/000000/M9DPLyjILyopzUvVzyrWL87OLNDNyczL1k3LTy4t1k3LrAAA.js
Requested by
Host: esplanade.sk
URL: https://esplanade.sk/
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
37.9.175.189 , Slovakia, ASN51013 (WEBSUPPORT-SRO-SK-AS, SK),
Reverse DNS
ing.r5.websupport.sk
Software
nginx / W3 Total Cache/0.9.4.1
Resource Hash
d60a25bf365a821766402f9386d89a32c08baea521ca222d832163abf8497b42

Request headers

sec-ch-ua
"Google Chrome";v="126", "Not:A-Brand";v="8", "Chromium";v="126"
Referer
https://esplanade.sk/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

pragma
public
date
Sun, 07 Jul 2024 11:03:35 GMT
content-encoding
gzip
last-modified
Wed, 27 Jan 2016 23:44:43 GMT
server
nginx
x-powered-by
W3 Total Cache/0.9.4.1
etag
"pub1453938283;gz"
vary
accept-encoding, Accept-Encoding,User-Agent
content-type
application/x-javascript; charset=utf-8
cache-control
max-age=31536000, public
alt-svc
h3=":443"; ma=86400
content-length
322
expires
Mon, 07 Jul 2025 11:03:35 GMT
M9DPLyjILyopzUvVzyrWTyvNSy7JzM8r1jHRLy_QTc1NSk3Ry83MAwA.js
esplanade.sk/wp-content/cache/minify/000000/
2 KB
1 KB
Script
General
Full URL
https://esplanade.sk/wp-content/cache/minify/000000/M9DPLyjILyopzUvVzyrWTyvNSy7JzM8r1jHRLy_QTc1NSk3Ry83MAwA.js
Requested by
Host: esplanade.sk
URL: https://esplanade.sk/
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
37.9.175.189 , Slovakia, ASN51013 (WEBSUPPORT-SRO-SK-AS, SK),
Reverse DNS
ing.r5.websupport.sk
Software
nginx / W3 Total Cache/0.9.4.1
Resource Hash
efed08616637f1226bde65c110b58a040611c2eda2b7cc791e476c778cd60a0b

Request headers

sec-ch-ua
"Google Chrome";v="126", "Not:A-Brand";v="8", "Chromium";v="126"
Referer
https://esplanade.sk/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

pragma
public
date
Sun, 07 Jul 2024 11:03:35 GMT
content-encoding
gzip
last-modified
Tue, 16 May 2023 22:41:20 GMT
server
nginx
x-powered-by
W3 Total Cache/0.9.4.1
etag
"pub1684276880;gz"
vary
accept-encoding, Accept-Encoding,User-Agent
content-type
application/x-javascript; charset=utf-8
cache-control
max-age=31536000, public
alt-svc
h3=":443"; ma=86400
content-length
1038
expires
Mon, 07 Jul 2025 11:03:34 GMT
memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-muw.woff2
fonts.gstatic.com/s/opensans/v40/
47 KB
48 KB
Font
General
Full URL
https://fonts.gstatic.com/s/opensans/v40/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-muw.woff2
Requested by
Host: fonts.googleapis.com
URL: https://fonts.googleapis.com/css?family=Open+Sans%3A300%2C400%2C600%2C700%2C800&subset=latin%2Clatin-ext
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a00:1450:4001:82b::2003 Frankfurt am Main, Germany, ASN15169 (GOOGLE, US),
Reverse DNS
Software
sffe /
Resource Hash
3c4d6a1421c7ddb7e404521fe8c4cd5be5af446d7689cd880be26612eaad3cfa
Security Headers
Name Value
X-Content-Type-Options nosniff
X-Xss-Protection 0

Request headers

sec-ch-ua
"Google Chrome";v="126", "Not:A-Brand";v="8", "Chromium";v="126"
Referer
https://fonts.googleapis.com/
Origin
https://esplanade.sk
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

date
Thu, 04 Jul 2024 09:37:33 GMT
x-content-type-options
nosniff
age
264362
content-security-policy-report-only
require-trusted-types-for 'script'; report-uri https://csp.withgoogle.com/csp/apps-themes
cross-origin-resource-policy
cross-origin
alt-svc
h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
content-length
48236
x-xss-protection
0
last-modified
Thu, 14 Dec 2023 02:08:40 GMT
server
sffe
cross-origin-opener-policy
same-origin; report-to="apps-themes"
report-to
{"group":"apps-themes","max_age":2592000,"endpoints":[{"url":"https://csp.withgoogle.com/csp/report-to/apps-themes"}]}
content-type
font/woff2
access-control-allow-origin
*
cache-control
public, max-age=31536000
accept-ranges
bytes
timing-allow-origin
*
expires
Fri, 04 Jul 2025 09:37:33 GMT
memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTSGmu1aB.woff2
fonts.gstatic.com/s/opensans/v40/
35 KB
35 KB
Font
General
Full URL
https://fonts.gstatic.com/s/opensans/v40/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTSGmu1aB.woff2
Requested by
Host: fonts.googleapis.com
URL: https://fonts.googleapis.com/css?family=Open+Sans%3A300%2C400%2C600%2C700%2C800&subset=latin%2Clatin-ext
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a00:1450:4001:82b::2003 Frankfurt am Main, Germany, ASN15169 (GOOGLE, US),
Reverse DNS
Software
sffe /
Resource Hash
adfa45260a1306cb5fefc1f17c1b5e7b61135534a82bf1b8e3d0540af7e07e3b
Security Headers
Name Value
X-Content-Type-Options nosniff
X-Xss-Protection 0

Request headers

sec-ch-ua
"Google Chrome";v="126", "Not:A-Brand";v="8", "Chromium";v="126"
Referer
https://fonts.googleapis.com/
Origin
https://esplanade.sk
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

date
Thu, 04 Jul 2024 18:45:03 GMT
x-content-type-options
nosniff
age
231512
content-security-policy-report-only
require-trusted-types-for 'script'; report-uri https://csp.withgoogle.com/csp/apps-themes
cross-origin-resource-policy
cross-origin
alt-svc
h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
content-length
35328
x-xss-protection
0
last-modified
Thu, 14 Dec 2023 02:00:45 GMT
server
sffe
cross-origin-opener-policy
same-origin; report-to="apps-themes"
report-to
{"group":"apps-themes","max_age":2592000,"endpoints":[{"url":"https://csp.withgoogle.com/csp/report-to/apps-themes"}]}
content-type
font/woff2
access-control-allow-origin
*
cache-control
public, max-age=31536000
accept-ranges
bytes
timing-allow-origin
*
expires
Fri, 04 Jul 2025 18:45:03 GMT
cropped-003-32x32.jpg
esplanade.sk/wp-content/uploads/2016/01/
1 KB
1 KB
Other
General
Full URL
https://esplanade.sk/wp-content/uploads/2016/01/cropped-003-32x32.jpg
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
37.9.175.189 , Slovakia, ASN51013 (WEBSUPPORT-SRO-SK-AS, SK),
Reverse DNS
ing.r5.websupport.sk
Software
nginx / W3 Total Cache/0.9.4.1
Resource Hash
635e50f38d924a52c789a4810b89d5630e0bdc675d860e8fd325af6037c81484

Request headers

sec-ch-ua
"Google Chrome";v="126", "Not:A-Brand";v="8", "Chromium";v="126"
Referer
https://esplanade.sk/
Accept-Language
de-DE,de;q=0.9;q=0.9
sec-ch-ua-mobile
?0
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36
sec-ch-ua-platform
"Win32"

Response headers

pragma
public
date
Sun, 07 Jul 2024 11:03:35 GMT
last-modified
Tue, 12 Jan 2016 11:55:26 GMT
server
nginx
etag
"419-52921baab4780"
x-powered-by
W3 Total Cache/0.9.4.1
vary
User-Agent
content-type
image/jpeg
cache-control
max-age=31536000, public
accept-ranges
bytes
alt-svc
h3=":443"; ma=86400
content-length
1049
expires
Mon, 07 Jul 2025 11:03:35 GMT

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8 JavaScript Global Variables

These are the non-standard "global" variables defined on the window object. These can be helpful in identifying possible client-side frameworks and code.

undefined| event object| fence object| sharedStorage object| _wpemojiSettings undefined| $ function| jQuery object| screenReaderText object| wp

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1 Console Messages

Source Level URL
Text
rendering warning URL: https://esplanade.sk/
Message:
Canvas2D: Multiple readback operations using getImageData are faster with the willReadFrequently attribute set to true. See: https://html.spec.whatwg.org/multipage/canvas.html#concept-canvas-will-read-frequently