HTTP Headers Analysis for https://glimmer.rstudio.com

HTTP Security Headers

Status

Strict-Transport-Security

Present

max-age=31536000

Content-Security-Policy

Basic

base-uri; object-src; script-src; +1 more Analyze

Content-Security-Policy-Report-Only

Missing

Not configured Analyze

X-Frame-Options

Good

SAMEORIGIN

X-Content-Type-Options

Good

nosniff

Referrer-Policy

Missing

Not configured

Permissions-Policy

Present

ch-ua-arch=*, ch-ua-bitness=*, ch-ua-full-version=*; +6 more

Recommendations

• Increase HSTS max-age to at least 1 year and add includeSubDomains
• Improve CSP by adding more specific directives and removing 'unsafe-inline'
• Add Referrer-Policy header (recommended: strict-origin-when-cross-origin)

Performance Headers

Accept-Ranges

Performance

none

Connection

Performance

close

Transfer-Encoding

Performance

chunked

Vary

Performance

Sec-CH-Viewport-Width, Sec-CH-DPR, Device-Memory,Accept-Encoding

accept-ranges: none
connection: close
transfer-encoding: chunked
vary: Sec-CH-Viewport-Width, Sec-CH-DPR, Device-Memory,Accept-Encoding

Caching Headers

Cache-Control

Caching

no-cache, no-store, max-age=0, must-revalidate

Expires

Caching

Mon, 01 Jan 1990 00:00:00 GMT

Pragma

Caching

no-cache

cache-control: no-cache, no-store, max-age=0, must-revalidate
expires: Mon, 01 Jan 1990 00:00:00 GMT
pragma: no-cache

Content Headers

Content-Type

Content

text/html; charset=utf-8

content-type: text/html; charset=utf-8

Server Headers

Server

ESF

server: ESF

CORS Headers

No CORS headers found

Cookies Headers

Set-Cookie

Cookies

set-cookie: __Secure-YNID=20.YT=fIwY1LC5t3a_XF-sTm2shxIlOwKOEoNnkwBlkkk3FGYCHVSkkwlIEfU2WsGii8abeW-XSJa35UsM-nhj-0as4ReiI_030wlWauiXECHdZT6EOc0T4eEpIjgw78o92nzld7KEBMAUa9p_eRhb763tpuU00JuYPsV9h7Jr7PdVWixEfSpd-_7Vgb5UmfIktfwrZDA5CUuW3aH0os13KoxdLMOlzaOLfV0fYzTZQWGCcE4bCuj7fwjpn6IqjUfQRRMCT-shkL65EokbmK6TfzDJL7m_RTxtxo3bjbCw4VGt6FZcMssk-w25XWDDWf582vWQnFPZFrBYyaXxDgHfAQ7EpA; expires=Sun, 24-Jan-2027 21:46:05 GMT; path=/; domain=.youtube.com; Secure; HttpOnly; SameSite=none
GPS=1; Domain=.youtube.com; Expires=Tue, 28-Jul-2026 22:16:05 GMT; Path=/; Secure; HttpOnly
YSC=qZSHay3Ma70; Domain=.youtube.com; Path=/; Secure; HttpOnly; SameSite=none
__Secure-YEC=; Domain=.youtube.com; Expires=Wed, 01-Nov-2023 21:46:05 GMT; Path=/; Secure; HttpOnly; SameSite=lax
VISITOR_INFO1_LIVE=Rgyho6QC0yA; Domain=.youtube.com; Expires=Sun, 24-Jan-2027 21:46:05 GMT; Path=/; Secure; HttpOnly; SameSite=none
VISITOR_PRIVACY_METADATA=CgJVUxIEGgAgaQ%3D%3D; Domain=.youtube.com; Expires=Sun, 24-Jan-2027 21:46:05 GMT; Path=/; Secure; HttpOnly; SameSite=none
__Secure-ROLLOUT_TOKEN=CPnMgrbvw5_3PxCT3M-grPaVAxiT3M-grPaVAw%3D%3D; Domain=youtube.com; Expires=Sun, 24-Jan-2027 21:46:05 GMT; Path=/; Secure; HttpOnly; SameSite=none; Partitioned

Other Headers

Accept-Ch

Other

Sec-CH-Viewport-Width, Sec-CH-DPR, Device-Memory

Alt-Svc

Other

h3=":443"; ma=2592000,h3-29=":443"; ma=2592000

Date

Other

Tue, 28 Jul 2026 21:46:05 GMT

Document-Policy

Other

include-js-call-stacks-in-crash-reports

Origin-Trial

Other

AmhMBR6zCLzDDxpW+HfpP67BqwIknWnyMOXOQGfzYswFmJe+fgaI6XZgAzcxOrzNtP7hEDsOo1jdjFnVr2IdxQ4AAAB4eyJvcmlnaW4iOiJodHRwczovL3lvdXR1YmUuY29tOjQ0MyIsImZlYXR1cmUiOiJXZWJWaWV3WFJlcXVlc3RlZFdpdGhEZXByZWNhdGlvbiIsImV4cGlyeSI6MTc1ODA2NzE5OSwiaXNTdWJkb21haW4iOnRydWV9, AiDEBptUfVeO93q48VdVMe/ubupazdAl8AaHP+NBzdnW8quUcHdzJUyGSfrmtpKJu7EOvwRp9ug2rEo3XU+WMAMAAAB2eyJvcmlnaW4iOiJodHRwczovL3lvdXR1YmUuY29tOjQ0MyIsImZlYXR1cmUiOiJEZXZpY2VCb3VuZFNlc3Npb25DcmVkZW50aWFsczIiLCJleHBpcnkiOjE3NzQzMTA0MDAsImlzU3ViZG9tYWluIjp0cnVlfQ==

P3p

Other

CP="This is not a P3P policy! See http://support.google.com/accounts/answer/151657?hl=en for more info."

Report-To

Other

Group youtube_main max-age: 4w

Endpoint 1 https://csp.withgoogle.com/csp/report-to/youtube_main

Reporting-Endpoints

Other

crash-reporting="/web-reports?context=eJwNz39MlXUUx3Eu71LiAvde7nOf5_l-qc0prp9XrxSYi2ppOcWBlqt0yBCIHI1f0gVxOWxZBlsxK1wjg2wzJVrooigiwixhtWsYrHXjl6ahiQzrZoiR2vnjtXP-OZ9zTuwXc5NXlTo23V7heG1l0DF9MOj4uCvomJxX5cieX-UoPlXtaHZviK6-FEv23U4GM5xMZjnpOOSk6xMno-edpFbG0d0YT96ZeFo6E1jXl8AbYupaAmkPuqgqdOGscvFOnYslb7uwfnDRnexmYJ-buYfdjFxxU5_q4d0nPYzmesjc4mHHDg8vi-X1HnpaPSS1edjY6eHWCx7OzHi4kZFIZnYi6QNSk7z4U73MrPUSW-Zl_EUv3e1eVoa9NES8_DfrpTzOIOIyWGcZ5AcNahoN2vYbTPYZlIYMSoYMys8bjF832HrDoCnKx6OmjwW2j_4kH4-s95FV7ePD3T5Kan049vo4ccLHlx6TBV6T2cUmeUtMctaYxGSZ7CkwCRWbXHne5JtKk5aXTBr6TC6GTRovmFyOtqiKtzh6p0XbaouoDIur1RZTdRavfG0R02Mxdsxi-LjFzK8WxSPSj1rkTFgMRCyu_W3x-oyF41-LvdctVsTarLVtVLpNwwab0Gab31-w2VZns7nZZqDFJrHd5uJ3Nr0_2tT_YuMI26wW74kjf9msn7FZgeLoHMUdiYqSeYrjKYqb7lN0LVM0PqA4nK54-CHF0HLF5fWKvjwFzyl2bVUcrFAM1yimd0q_TzHxgeKtQ4otHykibYqYTxVTHYraLsn4VhEOKRaelNxBxU9hRfOQ4olhyR4RY4pbTsvsb4oi0XJOcf8fctOkov-SzEcUgWmFjtKkizU3a4x4zfBtGhZqQndp7vFrHlusWSUyRCBd05yp6XhcU_uUxvG0ZukmzatlmrRKzb3bNaniQI2mRbSKNnFEtIvPRaf4SvSIY6JXfC9Col8MiJ9FWAyLMXFanBXnxISYFH-KiJgWV8WsSNitydmjebNJ8_5-zbJW-U2Ufya7RzQbT2nG_9HsnNYkxyaRGBfT1HtgcI77ZPeus9Hz_dvLKoOV-YWLthXm-5-tKCsN-gtLn_EXVBQFiwryinNTAilpgaUpaYsCqbnlgf8BgfMxkg"

accept-ch: Sec-CH-Viewport-Width, Sec-CH-DPR, Device-Memory
alt-svc: h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
date: Tue, 28 Jul 2026 21:46:05 GMT
document-policy: include-js-call-stacks-in-crash-reports
origin-trial: AmhMBR6zCLzDDxpW+HfpP67BqwIknWnyMOXOQGfzYswFmJe+fgaI6XZgAzcxOrzNtP7hEDsOo1jdjFnVr2IdxQ4AAAB4eyJvcmlnaW4iOiJodHRwczovL3lvdXR1YmUuY29tOjQ0MyIsImZlYXR1cmUiOiJXZWJWaWV3WFJlcXVlc3RlZFdpdGhEZXByZWNhdGlvbiIsImV4cGlyeSI6MTc1ODA2NzE5OSwiaXNTdWJkb21haW4iOnRydWV9, AiDEBptUfVeO93q48VdVMe/ubupazdAl8AaHP+NBzdnW8quUcHdzJUyGSfrmtpKJu7EOvwRp9ug2rEo3XU+WMAMAAAB2eyJvcmlnaW4iOiJodHRwczovL3lvdXR1YmUuY29tOjQ0MyIsImZlYXR1cmUiOiJEZXZpY2VCb3VuZFNlc3Npb25DcmVkZW50aWFsczIiLCJleHBpcnkiOjE3NzQzMTA0MDAsImlzU3ViZG9tYWluIjp0cnVlfQ==
p3p: CP="This is not a P3P policy! See http://support.google.com/accounts/answer/151657?hl=en for more info."
report-to: {"group":"youtube_main","max_age":2592000,"endpoints":[{"url":"https://csp.withgoogle.com/csp/report-to/youtube_main"}]}
reporting-endpoints: crash-reporting="/web-reports?context=eJwNz39MlXUUx3Eu71LiAvde7nOf5_l-qc0prp9XrxSYi2ppOcWBlqt0yBCIHI1f0gVxOWxZBlsxK1wjg2wzJVrooigiwixhtWsYrHXjl6ahiQzrZoiR2vnjtXP-OZ9zTuwXc5NXlTo23V7heG1l0DF9MOj4uCvomJxX5cieX-UoPlXtaHZviK6-FEv23U4GM5xMZjnpOOSk6xMno-edpFbG0d0YT96ZeFo6E1jXl8AbYupaAmkPuqgqdOGscvFOnYslb7uwfnDRnexmYJ-buYfdjFxxU5_q4d0nPYzmesjc4mHHDg8vi-X1HnpaPSS1edjY6eHWCx7OzHi4kZFIZnYi6QNSk7z4U73MrPUSW-Zl_EUv3e1eVoa9NES8_DfrpTzOIOIyWGcZ5AcNahoN2vYbTPYZlIYMSoYMys8bjF832HrDoCnKx6OmjwW2j_4kH4-s95FV7ePD3T5Kan049vo4ccLHlx6TBV6T2cUmeUtMctaYxGSZ7CkwCRWbXHne5JtKk5aXTBr6TC6GTRovmFyOtqiKtzh6p0XbaouoDIur1RZTdRavfG0R02Mxdsxi-LjFzK8WxSPSj1rkTFgMRCyu_W3x-oyF41-LvdctVsTarLVtVLpNwwab0Gab31-w2VZns7nZZqDFJrHd5uJ3Nr0_2tT_YuMI26wW74kjf9msn7FZgeLoHMUdiYqSeYrjKYqb7lN0LVM0PqA4nK54-CHF0HLF5fWKvjwFzyl2bVUcrFAM1yimd0q_TzHxgeKtQ4otHykibYqYTxVTHYraLsn4VhEOKRaelNxBxU9hRfOQ4olhyR4RY4pbTsvsb4oi0XJOcf8fctOkov-SzEcUgWmFjtKkizU3a4x4zfBtGhZqQndp7vFrHlusWSUyRCBd05yp6XhcU_uUxvG0ZukmzatlmrRKzb3bNaniQI2mRbSKNnFEtIvPRaf4SvSIY6JXfC9Col8MiJ9FWAyLMXFanBXnxISYFH-KiJgWV8WsSNitydmjebNJ8_5-zbJW-U2Ufya7RzQbT2nG_9HsnNYkxyaRGBfT1HtgcI77ZPeus9Hz_dvLKoOV-YWLthXm-5-tKCsN-gtLn_EXVBQFiwryinNTAilpgaUpaYsCqbnlgf8BgfMxkg"

Recommendations

Enable compression (gzip/brotli) to improve performance