URL: https://www.praha4mo01.cz/
Submission: On February 27 via automatic, source certstream-suspicious

Summary

This website contacted 5 IPs in 2 countries across 3 domains to perform 13 HTTP transactions. The main IP is 2a02:4a8:ac24:110::10:98, located in Czech Republic and belongs to GLOBE-AS http://www.active24.cz/, CZ. The main domain is www.praha4mo01.cz.
TLS certificate: Issued by R3 on December 29th 2020. Valid for: 3 months.
This is the only time www.praha4mo01.cz was scanned on urlscan.io!

urlscan.io Verdict: No classification

Domain & IP information

IP Address AS Autonomous System
10 2a02:4a8:ac24... 25234 (GLOBE-AS ...)
1 2a00:1450:400... 15169 (GOOGLE)
1 2a00:1450:400... 15169 (GOOGLE)
1 2a00:1450:400... 15169 (GOOGLE)
13 5
Apex Domain
Subdomains
Transfer
10 praha4mo01.cz
www.praha4mo01.cz
100 KB
2 gstatic.com
fonts.gstatic.com
19 KB
1 googleapis.com
fonts.googleapis.com
925 B
13 3
Domain Requested by
10 www.praha4mo01.cz www.praha4mo01.cz
2 fonts.gstatic.com fonts.googleapis.com
1 fonts.googleapis.com www.praha4mo01.cz
13 3

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

Domain
cs.wordpress.org
ronangelo.com
Subject Issuer Validity Valid
www.praha4mo01.cz
R3
2020-12-29 -
2021-03-29
3 months crt.sh
upload.video.google.com
GTS CA 1O1
2021-01-26 -
2021-04-20
3 months crt.sh
*.gstatic.com
GTS CA 1O1
2021-01-26 -
2021-04-20
3 months crt.sh

This page contains 1 frames:

Primary Page: https://www.praha4mo01.cz/
Frame ID: E632CE9E62A1D6BFD9D9EE82570CC8CE
Requests: 14 HTTP requests in this frame

Screenshot


Detected technologies

Overall confidence: 100%
Detected patterns
  • headers link /rel="https:\/\/api\.w\.org\/"/i

Overall confidence: 100%
Detected patterns
  • headers link /rel="https:\/\/api\.w\.org\/"/i

Overall confidence: 100%
Detected patterns
  • headers link /rel="https:\/\/api\.w\.org\/"/i

Overall confidence: 100%
Detected patterns
  • headers server /nginx(?:\/([\d.]+))?/i

Page Statistics

13
Requests

100 %
HTTPS

100 %
IPv6

3
Domains

3
Subdomains

5
IPs

2
Countries

133 kB
Transfer

242 kB
Size

0
Cookies

Redirected requests

There were HTTP redirect chains for the following requests:

13 HTTP transactions

Resource
Path
Size
x-fer
Type
MIME-Type
Primary Request /
www.praha4mo01.cz/
12 KB
4 KB
Document
General
Full URL
https://www.praha4mo01.cz/
Protocol
H2
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
2a02:4a8:ac24:110::10:98 , Czech Republic, ASN25234 (GLOBE-AS http://www.active24.cz/, CZ),
Reverse DNS
Software
nginx /
Resource Hash
c869b31915ad1659dcedf1bfd7b3f84f8b7c0bc0c93008abb11cc58b336afc1f
Security Headers
Name Value
Content-Security-Policy upgrade-insecure-requests

Request headers

:method
GET
:authority
www.praha4mo01.cz
:scheme
https
:path
/
pragma
no-cache
cache-control
no-cache
upgrade-insecure-requests
1
user-agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36
accept
text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
sec-fetch-site
none
sec-fetch-mode
navigate
sec-fetch-user
?1
sec-fetch-dest
document
accept-encoding
gzip, deflate, br
accept-language
en-US
Upgrade-Insecure-Requests
1
User-Agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36

Response headers

server
nginx
date
Sat, 27 Feb 2021 01:10:27 GMT
content-type
text/html; charset=UTF-8
link
<https://www.praha4mo01.cz/index.php?rest_route=/>; rel="https://api.w.org/"
content-security-policy
upgrade-insecure-requests
content-encoding
gzip
css
fonts.googleapis.com/
9 KB
925 B
Stylesheet
General
Full URL
https://fonts.googleapis.com/css?family=Roboto+Condensed%3A400%2C700%7CArimo%3A400%2C700&ver=4.9.3
Requested by
Host: www.praha4mo01.cz
URL: https://www.praha4mo01.cz/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a00:1450:4001:82a::200a Frankfurt am Main, Germany, ASN15169 (GOOGLE, US),
Reverse DNS
Software
ESF /
Resource Hash
de5406ff60f615478755e45c93550412b13154def53be37c5f7f37cfb2ee7afe
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

Referer
https://www.praha4mo01.cz/
User-Agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36

Response headers

strict-transport-security
max-age=31536000
content-encoding
gzip
x-content-type-options
nosniff
cross-origin-resource-policy
cross-origin
alt-svc
h3-29=":443"; ma=2592000,h3-T051=":443"; ma=2592000,h3-Q050=":443"; ma=2592000,h3-Q046=":443"; ma=2592000,h3-Q043=":443"; ma=2592000,quic=":443"; ma=2592000; v="46,43"
x-xss-protection
0
last-modified
Sat, 27 Feb 2021 01:05:55 GMT
server
ESF
date
Sat, 27 Feb 2021 01:10:27 GMT
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
Sat, 27 Feb 2021 01:10:27 GMT
genericons.css
www.praha4mo01.cz/wp-content/themes/frontier/includes/genericons/
28 KB
16 KB
Stylesheet
General
Full URL
https://www.praha4mo01.cz/wp-content/themes/frontier/includes/genericons/genericons.css?ver=1.3.0
Requested by
Host: www.praha4mo01.cz
URL: https://www.praha4mo01.cz/
Protocol
H2
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
2a02:4a8:ac24:110::10:98 , Czech Republic, ASN25234 (GLOBE-AS http://www.active24.cz/, CZ),
Reverse DNS
Software
nginx /
Resource Hash
11767e2677e127953439c215e06fd9a229dea6affa64d2fd37b67898d7ab7363
Security Headers
Name Value
Content-Security-Policy upgrade-insecure-requests

Request headers

Referer
https://www.praha4mo01.cz/
User-Agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36

Response headers

date
Sat, 27 Feb 2021 01:10:27 GMT
content-encoding
gzip
last-modified
Tue, 05 Dec 2017 07:29:14 GMT
server
nginx
etag
W/"6e71-55f92cabbc534"
content-security-policy
upgrade-insecure-requests
content-type
text/css
style.css
www.praha4mo01.cz/wp-content/themes/frontier/
26 KB
8 KB
Stylesheet
General
Full URL
https://www.praha4mo01.cz/wp-content/themes/frontier/style.css?ver=1.3.0
Requested by
Host: www.praha4mo01.cz
URL: https://www.praha4mo01.cz/
Protocol
H2
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
2a02:4a8:ac24:110::10:98 , Czech Republic, ASN25234 (GLOBE-AS http://www.active24.cz/, CZ),
Reverse DNS
Software
nginx /
Resource Hash
77f00ce5c629e8a14365bab470f713e300c6364277d9f97aca28565b5bca7324
Security Headers
Name Value
Content-Security-Policy upgrade-insecure-requests

Request headers

Referer
https://www.praha4mo01.cz/
User-Agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36

Response headers

date
Sat, 27 Feb 2021 01:10:27 GMT
content-encoding
gzip
last-modified
Tue, 05 Dec 2017 07:29:14 GMT
server
nginx
etag
W/"664b-55f92cabb09b5"
content-security-policy
upgrade-insecure-requests
content-type
text/css
responsive.css
www.praha4mo01.cz/wp-content/themes/frontier/
3 KB
1 KB
Stylesheet
General
Full URL
https://www.praha4mo01.cz/wp-content/themes/frontier/responsive.css?ver=1.3.0
Requested by
Host: www.praha4mo01.cz
URL: https://www.praha4mo01.cz/
Protocol
H2
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
2a02:4a8:ac24:110::10:98 , Czech Republic, ASN25234 (GLOBE-AS http://www.active24.cz/, CZ),
Reverse DNS
Software
nginx /
Resource Hash
1aabae36ee035e2a84ff6a04748907168e13730fad56b390a6198f1bd7e701e6
Security Headers
Name Value
Content-Security-Policy upgrade-insecure-requests

Request headers

Referer
https://www.praha4mo01.cz/
User-Agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36

Response headers

date
Sat, 27 Feb 2021 01:10:27 GMT
content-encoding
gzip
last-modified
Tue, 05 Dec 2017 07:29:14 GMT
server
nginx
etag
W/"ce8-55f92cabbe474"
content-security-policy
upgrade-insecure-requests
content-type
text/css
jquery.js
www.praha4mo01.cz/wp-includes/js/jquery/
95 KB
39 KB
Script
General
Full URL
https://www.praha4mo01.cz/wp-includes/js/jquery/jquery.js?ver=1.12.4
Requested by
Host: www.praha4mo01.cz
URL: https://www.praha4mo01.cz/
Protocol
H2
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
2a02:4a8:ac24:110::10:98 , Czech Republic, ASN25234 (GLOBE-AS http://www.active24.cz/, CZ),
Reverse DNS
Software
nginx /
Resource Hash
fc48d1d80ece71a79a7b39877f4104d49d3da6c3665cf6dc203000fb7df4447e
Security Headers
Name Value
Content-Security-Policy upgrade-insecure-requests

Request headers

Referer
https://www.praha4mo01.cz/
User-Agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36

Response headers

date
Sat, 27 Feb 2021 01:10:27 GMT
content-encoding
gzip
last-modified
Mon, 04 Dec 2017 00:01:07 GMT
server
nginx
etag
W/"17ba0-55f786a4f696e"
content-security-policy
upgrade-insecure-requests
content-type
application/javascript
jquery-migrate.min.js
www.praha4mo01.cz/wp-includes/js/jquery/
10 KB
4 KB
Script
General
Full URL
https://www.praha4mo01.cz/wp-includes/js/jquery/jquery-migrate.min.js?ver=1.4.1
Requested by
Host: www.praha4mo01.cz
URL: https://www.praha4mo01.cz/
Protocol
H2
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
2a02:4a8:ac24:110::10:98 , Czech Republic, ASN25234 (GLOBE-AS http://www.active24.cz/, CZ),
Reverse DNS
Software
nginx /
Resource Hash
48eb8b500ae6a38617b5738d2b3faec481922a7782246e31d2755c034a45cd5d
Security Headers
Name Value
Content-Security-Policy upgrade-insecure-requests

Request headers

Referer
https://www.praha4mo01.cz/
User-Agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36

Response headers

date
Sat, 27 Feb 2021 01:10:27 GMT
content-encoding
gzip
last-modified
Mon, 04 Dec 2017 00:01:07 GMT
server
nginx
etag
W/"2748-55f786a5005ae"
content-security-policy
upgrade-insecure-requests
content-type
application/javascript
bankrot_480-150x150.jpg
www.praha4mo01.cz/wp-content/uploads/2018/03/
5 KB
6 KB
Image
General
Full URL
https://www.praha4mo01.cz/wp-content/uploads/2018/03/bankrot_480-150x150.jpg
Requested by
Host: www.praha4mo01.cz
URL: https://www.praha4mo01.cz/
Protocol
H2
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
2a02:4a8:ac24:110::10:98 , Czech Republic, ASN25234 (GLOBE-AS http://www.active24.cz/, CZ),
Reverse DNS
Software
nginx /
Resource Hash
8ce14e0834f41660921c71982b397e5d2aaf4e361b29e02f44f35aaaca8b2628
Security Headers
Name Value
Content-Security-Policy upgrade-insecure-requests

Request headers

Referer
https://www.praha4mo01.cz/
User-Agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36

Response headers

content-security-policy
upgrade-insecure-requests
last-modified
Wed, 21 Mar 2018 23:37:18 GMT
server
nginx
etag
"1588-567f4ac005c0d"
content-type
image/jpeg
date
Sat, 27 Feb 2021 01:10:27 GMT
accept-ranges
bytes
content-length
5512
wp-embed.min.js
www.praha4mo01.cz/wp-includes/js/
1 KB
943 B
Script
General
Full URL
https://www.praha4mo01.cz/wp-includes/js/wp-embed.min.js?ver=4.9.3
Requested by
Host: www.praha4mo01.cz
URL: https://www.praha4mo01.cz/
Protocol
H2
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
2a02:4a8:ac24:110::10:98 , Czech Republic, ASN25234 (GLOBE-AS http://www.active24.cz/, CZ),
Reverse DNS
Software
nginx /
Resource Hash
dcb5e540e62fc85857254a1066afb6a7e8999279c6d4c583eef855d39f9289c0
Security Headers
Name Value
Content-Security-Policy upgrade-insecure-requests

Request headers

Referer
https://www.praha4mo01.cz/
User-Agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36

Response headers

date
Sat, 27 Feb 2021 01:10:27 GMT
content-encoding
gzip
last-modified
Mon, 04 Dec 2017 00:01:07 GMT
server
nginx
etag
W/"576-55f786a4beecf"
content-security-policy
upgrade-insecure-requests
content-type
application/javascript
honeycomb.png
www.praha4mo01.cz/wp-content/themes/frontier/images/
265 B
436 B
Image
General
Full URL
https://www.praha4mo01.cz/wp-content/themes/frontier/images/honeycomb.png
Requested by
Host: www.praha4mo01.cz
URL: https://www.praha4mo01.cz/
Protocol
H2
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
2a02:4a8:ac24:110::10:98 , Czech Republic, ASN25234 (GLOBE-AS http://www.active24.cz/, CZ),
Reverse DNS
Software
nginx /
Resource Hash
5ff46b82c72bcf5b303048058fff29bbc9a760a0fd65c75682b45c43ddfab637
Security Headers
Name Value
Content-Security-Policy upgrade-insecure-requests

Request headers

Referer
https://www.praha4mo01.cz/
User-Agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36

Response headers

content-security-policy
upgrade-insecure-requests
last-modified
Tue, 05 Dec 2017 07:29:14 GMT
server
nginx
etag
"109-55f92cabc22f4"
content-type
image/png
date
Sat, 27 Feb 2021 01:10:27 GMT
accept-ranges
bytes
content-length
265
cropped-bankrot_480.jpg
www.praha4mo01.cz/wp-content/uploads/2018/03/
20 KB
20 KB
Image
General
Full URL
https://www.praha4mo01.cz/wp-content/uploads/2018/03/cropped-bankrot_480.jpg
Requested by
Host: www.praha4mo01.cz
URL: https://www.praha4mo01.cz/
Protocol
H2
Security
TLS 1.2, ECDHE_RSA, AES_128_GCM
Server
2a02:4a8:ac24:110::10:98 , Czech Republic, ASN25234 (GLOBE-AS http://www.active24.cz/, CZ),
Reverse DNS
Software
nginx /
Resource Hash
3c8d5e25ba16bf0222817442a327106c94575c38ca783763bae8c4e6f2744939
Security Headers
Name Value
Content-Security-Policy upgrade-insecure-requests

Request headers

Referer
https://www.praha4mo01.cz/
User-Agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36

Response headers

content-security-policy
upgrade-insecure-requests
last-modified
Mon, 18 Nov 2019 19:08:34 GMT
server
nginx
etag
"5001-597a3ac90e746"
content-type
image/jpeg
date
Sat, 27 Feb 2021 01:10:27 GMT
accept-ranges
bytes
content-length
20481
ieVl2ZhZI2eCN5jzbjEETS9weq8-19K7DQk6YvM.woff2
fonts.gstatic.com/s/robotocondensed/v19/
11 KB
11 KB
Font
General
Full URL
https://fonts.gstatic.com/s/robotocondensed/v19/ieVl2ZhZI2eCN5jzbjEETS9weq8-19K7DQk6YvM.woff2
Requested by
Host: fonts.googleapis.com
URL: https://fonts.googleapis.com/css?family=Roboto+Condensed%3A400%2C700%7CArimo%3A400%2C700&ver=4.9.3
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a00:1450:4001:828::2003 Frankfurt am Main, Germany, ASN15169 (GOOGLE, US),
Reverse DNS
Software
sffe /
Resource Hash
49a1b4e1296645aa2f513c87a0e5fe56a305a7ed678c2f6499631ec1f3b35856
Security Headers
Name Value
X-Content-Type-Options nosniff
X-Xss-Protection 0

Request headers

Origin
https://www.praha4mo01.cz
Referer
https://fonts.googleapis.com/css?family=Roboto+Condensed%3A400%2C700%7CArimo%3A400%2C700&ver=4.9.3
User-Agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36

Response headers

date
Mon, 22 Feb 2021 13:34:30 GMT
x-content-type-options
nosniff
last-modified
Tue, 15 Sep 2020 18:08:42 GMT
server
sffe
age
387357
content-type
font/woff2
access-control-allow-origin
*
cache-control
public, max-age=31536000
accept-ranges
bytes
timing-allow-origin
*
alt-svc
h3-29=":443"; ma=2592000,h3-T051=":443"; ma=2592000,h3-Q050=":443"; ma=2592000,h3-Q046=":443"; ma=2592000,h3-Q043=":443"; ma=2592000,quic=":443"; ma=2592000; v="46,43"
content-length
10968
x-xss-protection
0
expires
Tue, 22 Feb 2022 13:34:30 GMT
truncated
/
14 KB
14 KB
Font
General
Full URL
data:truncated
Protocol
DATA
Server
-, , ASN (),
Reverse DNS
Software
/
Resource Hash
1cfd32e37f8aba263101f06e8f702adfaef55a6601857cf5e2c6dd0b0388dcd6

Request headers

Origin
https://www.praha4mo01.cz
Referer
User-Agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36

Response headers

Content-Type
application/x-font-woff;charset=utf-8
ieVl2ZhZI2eCN5jzbjEETS9weq8-19y7DQk6YvNkeg.woff2
fonts.gstatic.com/s/robotocondensed/v19/
8 KB
8 KB
Font
General
Full URL
https://fonts.gstatic.com/s/robotocondensed/v19/ieVl2ZhZI2eCN5jzbjEETS9weq8-19y7DQk6YvNkeg.woff2
Requested by
Host: fonts.googleapis.com
URL: https://fonts.googleapis.com/css?family=Roboto+Condensed%3A400%2C700%7CArimo%3A400%2C700&ver=4.9.3
Protocol
H3-Q050
Security
QUIC, , AES_128_GCM
Server
2a00:1450:4001:800::2003 Frankfurt am Main, Germany, ASN15169 (GOOGLE, US),
Reverse DNS
Software
sffe /
Resource Hash
d1783f1498861392a216ff253dbed107b292181afbb70f80765ea9c880c19117
Security Headers
Name Value
X-Content-Type-Options nosniff
X-Xss-Protection 0

Request headers

Origin
https://www.praha4mo01.cz
Referer
https://fonts.googleapis.com/css?family=Roboto+Condensed%3A400%2C700%7CArimo%3A400%2C700&ver=4.9.3
User-Agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36

Response headers

date
Tue, 23 Feb 2021 11:52:47 GMT
x-content-type-options
nosniff
last-modified
Tue, 15 Sep 2020 18:09:04 GMT
server
sffe
age
307060
content-type
font/woff2
access-control-allow-origin
*
cache-control
public, max-age=31536000
accept-ranges
bytes
timing-allow-origin
*
alt-svc
h3-29=":443"; ma=2592000,h3-T051=":443"; ma=2592000,h3-Q050=":443"; ma=2592000,h3-Q046=":443"; ma=2592000,h3-Q043=":443"; ma=2592000,quic=":443"; ma=2592000; v="46,43"
content-length
8036
x-xss-protection
0
expires
Wed, 23 Feb 2022 11:52:47 GMT

Verdicts & Comments Add Verdict or Comment

13 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.

object| ontransitionrun object| ontransitionstart object| ontransitioncancel object| cookieStore function| showDirectoryPicker function| showOpenFilePicker function| showSaveFilePicker object| trustedTypes boolean| crossOriginIsolated object| _wpemojiSettings undefined| $ function| jQuery object| wp

0 Cookies

1 Console Messages

Source Level URL
Text
console-api log URL: https://www.praha4mo01.cz/wp-includes/js/jquery/jquery-migrate.min.js?ver=1.4.1(Line 2)
Message:
JQMIGRATE: Migrate is installed, version 1.4.1

Security Headers

This page lists any security headers set by the main page. If you want to understand what these mean and how to use them, head on over to this page

Header Value
Content-Security-Policy upgrade-insecure-requests