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Mmdn_HTTP/Permissions_Policy_directives_14_7.txt
/docs/Web/HTTP/Headers/Permissions-Policy/encrypted-media) Experimental 11. [ Permissions-Policy: execution-while-not-rendered ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/execution-while-not-rendered) Experimental 12. [ Permissions-Policy: execution-while-out-of-viewport ](/en-US/docs/Web/HTTP/Headers/P...
Mmdn_HTTP/Permissions_Policy_directives_12_1.txt
otocol_upgrade_mechanism) 5. HTTP security 1. [ Content Security Policy (CSP) ](/en-US/docs/Web/HTTP/CSP) 2. [ HTTP Strict Transport Security (HSTS) ](/en-US/docs/Web/HTTP/Headers/Strict-Transport-Security) 3. [ X-Content-Type-Options ](/en-US/docs/Web/HTTP/Headers/X-Content-Type-Options) 4. [ X-Fram...
Mmdn_HTTP/HTTP_request_methods_1_6.txt
[ ` CSP: script-src-attr ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/script-src-attr) 25. [ ` CSP: script-src-elem ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/script-src-elem) 26. [ ` CSP: style-src ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/style-src) 27. [ ` CSP: st...
Mmdn_HTTP/HTTP_request_methods_8_0.txt
* Skip to main content * Skip to search * Skip to select language [ MDN Web Docs ](/en-US/) Open main menu * References [ References ](/en-US/docs/Web) * [ Overview / Web Technology Web technology reference for developers ](/en-US/docs/Web) * [ HTML Structure of content on the web ](/en-US/do...
Mmdn_HTTP/HTTP_headers_18_6.txt
m ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/style-src-elem) 29. [ ` CSP: trusted-types ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/trusted-types) Experimental 30. [ ` CSP: upgrade-insecure-requests ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/upgrade-insecure-requests) ...
Mmdn_HTTP/Permissions_Policy_directives_8_7.txt
sions-Policy: execution-while-out-of-viewport ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/execution-while-out-of-viewport) Experimental 13. [ Permissions-Policy: fullscreen ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/fullscreen) 14. [ Permissions-Policy: gamepad ](/en-US/docs/Web/HTTP/Headers/Permi...
Mmdn_HTTP/CSP_directives_25_10.txt
expressions The ` 'unsafe-eval' ` source expression controls several script execution methods that create code from strings. If a page has a CSP header and ` 'unsafe-eval' ` isn't specified with the ` script-src ` directive, the following methods are blocked and won't have any effect: * [ ` eval() ` ](/en-US/docs/...
Mmdn_HTTP/Permissions_Policy_directives_32_2.txt
[ ` Content-Security-Policy-Report-Only ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy-Report-Only) 36. [ ` Content-Type ` ](/en-US/docs/Web/HTTP/Headers/Content-Type) 37. [ ` Cookie ` ](/en-US/docs/Web/HTTP/Headers/Cookie) 38. [ ` Critical-CH ` ](/en-US/docs/Web/HTTP/Headers/Critical-CH) Experime...
Mmdn_HTTP/Permissions_Policy_directives_32_8.txt
en- US/docs/Web/API/Document/browsingTopics) method or send a request with a [ ` Sec-Browsing-Topics ` ](/en-US/docs/Web/HTTP/Headers/Sec-Browsing-Topics) header will fail with a ` NotAllowedError ` [ ` DOMException ` ](/en- US/docs/Web/API/DOMException) . ## Syntax http Permissions-Policy: browsing-t...
Mmdn_HTTP/HTTP_response_status_36_4.txt
/docs/Web/HTTP/Headers/Width) Non-standard Deprecated 130. [ ` WWW-Authenticate ` ](/en-US/docs/Web/HTTP/Headers/WWW-Authenticate) 131. [ ` X-Content-Type-Options ` ](/en-US/docs/Web/HTTP/Headers/X-Content-Type-Options) 132. [ ` X-DNS-Prefetch-Control ` ](/en-US/docs/Web/HTTP/Headers/X-DNS-Prefetch-Contro...
Mmdn_HTTP/CSP_directives_3_4.txt
nticate ` ](/en-US/docs/Web/HTTP/Headers/WWW-Authenticate) 131. [ ` X-Content-Type-Options ` ](/en-US/docs/Web/HTTP/Headers/X-Content-Type-Options) 132. [ ` X-DNS-Prefetch-Control ` ](/en-US/docs/Web/HTTP/Headers/X-DNS-Prefetch-Control) Non-standard 133. [ ` X-Forwarded-For ` ](/en-US/docs/Web/HTTP/Headers...
Mmdn_HTTP/HTTP_response_status_4_2.txt
/Headers/Content-Length) 32. [ ` Content-Location ` ](/en-US/docs/Web/HTTP/Headers/Content-Location) 33. [ ` Content-Range ` ](/en-US/docs/Web/HTTP/Headers/Content-Range) 34. [ ` Content-Security-Policy ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy) 35. [ ` Content-Security-Policy-Report-Only...
Mmdn_HTTP/Permissions_Policy_directives_7_1.txt
y (HSTS) ](/en-US/docs/Web/HTTP/Headers/Strict-Transport-Security) 3. [ X-Content-Type-Options ](/en-US/docs/Web/HTTP/Headers/X-Content-Type-Options) 4. [ X-Frame-Options ](/en-US/docs/Web/HTTP/Headers/X-Frame-Options) 5. [ X-XSS-Protection ](/en-US/docs/Web/HTTP/Headers/X-XSS-Protection) 6. [ Mozilla w...
Mmdn_HTTP/CSP_directives_9_7.txt
eaders/Permissions-Policy/encrypted-media) Experimental 11. [ Permissions-Policy: execution-while-not-rendered ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/execution-while-not-rendered) Experimental 12. [ Permissions-Policy: execution-while-out-of-viewport ](/en-US/docs/Web/HTTP/Headers/Permissions-Polic...
Mmdn_HTTP/Permissions_Policy_directives_16_0.txt
* Skip to main content * Skip to search * Skip to select language [ MDN Web Docs ](/en-US/) Open main menu * References [ References ](/en-US/docs/Web) * [ Overview / Web Technology Web technology reference for developers ](/en-US/docs/Web) * [ HTML Structure of content on the web ](/en-US/do...
Mmdn_HTTP/HTTP_request_methods_0_7.txt
erimental 10. [ Permissions-Policy: encrypted-media ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/encrypted-media) Experimental 11. [ Permissions-Policy: execution-while-not-rendered ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/execution-while-not-rendered) Experimental 12. [ Permissions-Policy:...
Mmdn_HTTP/CSP_directives_5_8.txt
for the ` font-src ` policy: http Content-Security-Policy: font-src <source>; Content-Security-Policy: font-src <source> <source>; ### Sources ` <source> ` can be any one of the values listed in [ CSP Source Values ](/en- US/docs/Web/HTTP/Headers/Content-Security-Policy/Sources#sources) . N...
Mmdn_HTTP/CSP_directives_9_5.txt
41. [ ` 421 Misdirected Request ` ](/en-US/docs/Web/HTTP/Status/421) 42. [ ` 422 Unprocessable Content ` ](/en-US/docs/Web/HTTP/Status/422) 43. [ ` 423 Locked ` ](/en-US/docs/Web/HTTP/Status/423) 44. [ ` 424 Failed Dependency ` ](/en-US/docs/Web/HTTP/Status/424) 45. [ ` 425 Too Early ` ](/en-US/docs/W...
Mmdn_HTTP/CSP_directives_19_9.txt
C%2Fdetails%3E "This will take you to GitHub to file a new issue.") [ MDN logo ](/) Your blueprint for a better internet. * [ MDN on Mastodon ](https://mozilla.social/@mdn) * [ MDN on X (formerly Twitter) ](https://twitter.com/mozdevnet) * [ MDN on GitHub ](https://github.com/mdn/) * [ MDN Blog RSS Feed ...
Mmdn_HTTP/HTTP_response_status_39_6.txt
cs/Web/HTTP/Headers/Content-Security-Policy/script-src) 24. [ ` CSP: script-src-attr ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/script-src-attr) 25. [ ` CSP: script-src-elem ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/script-src-elem) 26. [ ` CSP: style-src ` ](/en-US/docs/Web/HTT...
Mmdn_HTTP/Header_Field_Definitions_55_1.txt
applied MUST be added by an intermediate cache or proxy if it applies any transformation changing the content-coding (as specified in the Content-Encoding header) or media-type (as specified in the Content-Type header) of the response, or the entity-body of the response, unless this Warning code already appears in the ...
Mmdn_HTTP/HTTP_headers_19_4.txt
trol) Non-standard 133. [ ` X-Forwarded-For ` ](/en-US/docs/Web/HTTP/Headers/X-Forwarded-For) Non-standard 134. [ ` X-Forwarded-Host ` ](/en-US/docs/Web/HTTP/Headers/X-Forwarded-Host) Non-standard 135. [ ` X-Forwarded-Proto ` ](/en-US/docs/Web/HTTP/Headers/X-Forwarded-Proto) Non-standard 136. [ ` X-...
Mmdn_HTTP/Permissions_Policy_directives_16_9.txt
cy/websites/) * [ Cookies ](https://www.mozilla.org/privacy/websites/#cookies) * [ Legal ](https://www.mozilla.org/about/legal/terms/mozilla) * [ Community Participation Guidelines ](https://www.mozilla.org/about/governance/policies/participation/) Visit [ Mozilla Corporation’s ](https://www.mozilla.org) not-...
Mmdn_HTTP/HTTP_response_status_9_2.txt
` Content-Range ` ](/en-US/docs/Web/HTTP/Headers/Content-Range) 34. [ ` Content-Security-Policy ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy) 35. [ ` Content-Security-Policy-Report-Only ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy-Report-Only) 36. [ ` Content-Type ` ](/en-US/docs/We...
Mmdn_HTTP/HTTP_headers_35_9.txt
lla.org contributors. Content available under [ a Creative Commons license ](/en- US/docs/MDN/Writing_guidelines/Attrib_copyright_license) . *[ Non-standard ]: Non-standard. Check cross-browser support before using. *[ ...
Mmdn_HTTP/HTTP_response_status_13_1.txt
[ Protocol upgrade mechanism ](/en-US/docs/Web/HTTP/Protocol_upgrade_mechanism) 5. HTTP security 1. [ Content Security Policy (CSP) ](/en-US/docs/Web/HTTP/CSP) 2. [ HTTP Strict Transport Security (HSTS) ](/en-US/docs/Web/HTTP/Headers/Strict-Transport-Security) 3. [ X-Content-Type-Options ](/en-US/docs/We...
Mmdn_HTTP/CSP_directives_3_7.txt
sions-Policy/encrypted-media) Experimental 11. [ Permissions-Policy: execution-while-not-rendered ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/execution-while-not-rendered) Experimental 12. [ Permissions-Policy: execution-while-out-of-viewport ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/execution-w...
Mmdn_HTTP/CSP_directives_23_5.txt
est ` ](/en-US/docs/Web/HTTP/Status/421) 42. [ ` 422 Unprocessable Content ` ](/en-US/docs/Web/HTTP/Status/422) 43. [ ` 423 Locked ` ](/en-US/docs/Web/HTTP/Status/423) 44. [ ` 424 Failed Dependency ` ](/en-US/docs/Web/HTTP/Status/424) 45. [ ` 425 Too Early ` ](/en-US/docs/Web/HTTP/Status/425) 46. [ ...
Mmdn_HTTP/HTTP_response_status_34_8.txt
cookies. Servers will often produce this status if: * The [ ` Referer ` ](/en-US/docs/Web/HTTP/Headers/Referer) URL is too long * There are too many [ Cookies ](/en-US/docs/Web/HTTP/Cookies) sent in the request ## Status http 431 Request Header Fields Too Large ## Specifications Speci...
Mmdn_HTTP/HTTP_response_status_30_9.txt
r use in new websites. *[ Experimental ]: Experimental. Expect behavior to change in the future.
Mmdn_HTTP/HTTP_response_status_51_0.txt
* Skip to main content * Skip to search * Skip to select language [ MDN Web Docs ](/en-US/) Open main menu * References [ References ](/en-US/docs/Web) * [ Overview / Web Technology Web technology reference for developers ](/en-US/docs/Web) * [ HTML Structure of content on the web ](/en-US/do...
Mmdn_HTTP/HTTP_response_status_21_8.txt
e ](https://github.com/mdn/content/blob/main/CONTRIBUTING.md "This will take you to our contribution guidelines on GitHub.") . This page was last modified on Apr 10, 2023 by [ MDN contributors ](/en- US/docs/Web/HTTP/Status/506/contributors.txt) . [ View this page on GitHub ](https://github.com/mdn/content/blob/ma...
Mmdn_HTTP/Permissions_Policy_directives_30_7.txt
ions-Policy: execution-while-not-rendered ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/execution-while-not-rendered) Experimental 12. [ Permissions-Policy: execution-while-out-of-viewport ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/execution-while-out-of-viewport) Experimental 13. [ Permissions-Pol...
Mmdn_HTTP/HTTP_response_status_36_1.txt
management_in_HTTP_1.x) 7. [ Protocol upgrade mechanism ](/en-US/docs/Web/HTTP/Protocol_upgrade_mechanism) 5. HTTP security 1. [ Content Security Policy (CSP) ](/en-US/docs/Web/HTTP/CSP) 2. [ HTTP Strict Transport Security (HSTS) ](/en-US/docs/Web/HTTP/Headers/Strict-Transport-Security) 3. [ X-Conten...
Mmdn_HTTP/CSP_directives_2_7.txt
tal 10. [ Permissions-Policy: encrypted-media ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/encrypted-media) Experimental 11. [ Permissions-Policy: execution-while-not-rendered ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/execution-while-not-rendered) Experimental 12. [ Permissions-Policy: execu...
Mmdn_HTTP/HTTP_response_status_44_5.txt
teapot ` ](/en-US/docs/Web/HTTP/Status/418) 41. [ ` 421 Misdirected Request ` ](/en-US/docs/Web/HTTP/Status/421) 42. [ ` 422 Unprocessable Content ` ](/en-US/docs/Web/HTTP/Status/422) 43. [ ` 423 Locked ` ](/en-US/docs/Web/HTTP/Status/423) 44. [ ` 424 Failed Dependency ` ](/en-US/docs/Web/HTTP/Status/42...
Mmdn_HTTP/HTTP_headers_30_2.txt
P/Headers/Content-Range) 34. [ ` Content-Security-Policy ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy) 35. [ ` Content-Security-Policy-Report-Only ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy-Report-Only) 36. [ ` Content-Type ` ](/en-US/docs/Web/HTTP/Headers/Content-Type) 37. [ `...
Mmdn_HTTP/Permissions_Policy_directives_26_2.txt
rity-Policy-Report-Only ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy-Report-Only) 36. [ ` Content-Type ` ](/en-US/docs/Web/HTTP/Headers/Content-Type) 37. [ ` Cookie ` ](/en-US/docs/Web/HTTP/Headers/Cookie) 38. [ ` Critical-CH ` ](/en-US/docs/Web/HTTP/Headers/Critical-CH) Experimental 39. [ ...
Mmdn_HTTP/HTTP_headers_24_8.txt
The browser will subsequently use those topics to calculate top topics for the current user for future epochs. See [ Using the Topics API ](/en-US/docs/Web/API/Topics_API/Using) for more details. Header type | [ Response header ](/en-US/docs/Glossary/Response_header) ---|--- [ Forbidden header name ](/en-US/do...
Mmdn_HTTP/HTTP_response_status_56_8.txt
n GitHub.") . This page was last modified on Apr 10, 2023 by [ MDN contributors ](/en- US/docs/Web/HTTP/Status/510/contributors.txt) . [ View this page on GitHub ](https://github.com/mdn/content/blob/main/files/en- us/web/http/status/510/index.md?plain=1 "Folder: en-us/web/http/status/510 \(Opens in a new tab\)") ...
Mmdn_HTTP/Permissions_Policy_directives_6_5.txt
ency ` ](/en-US/docs/Web/HTTP/Status/424) 45. [ ` 425 Too Early ` ](/en-US/docs/Web/HTTP/Status/425) 46. [ ` 426 Upgrade Required ` ](/en-US/docs/Web/HTTP/Status/426) 47. [ ` 428 Precondition Required ` ](/en-US/docs/Web/HTTP/Status/428) 48. [ ` 429 Too Many Requests ` ](/en-US/docs/Web/HTTP/Status/429)...
Mmdn_HTTP/HTTP_response_status_13_2.txt
Content-Location ` ](/en-US/docs/Web/HTTP/Headers/Content-Location) 33. [ ` Content-Range ` ](/en-US/docs/Web/HTTP/Headers/Content-Range) 34. [ ` Content-Security-Policy ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy) 35. [ ` Content-Security-Policy-Report-Only ` ](/en-US/docs/Web/HTTP/Headers/Co...
Mmdn_HTTP/HTTP_response_status_59_6.txt
lem ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/script-src-elem) 26. [ ` CSP: style-src ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/style-src) 27. [ ` CSP: style-src-attr ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/style-src-attr) 28. [ ` CSP: style-src-elem ` ](/en-US...
Mmdn_HTTP/CSP_directives_29_9.txt
%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen- us%2Fweb%2Fhttp%2Fheaders%2Fcontent-security-policy%2Ftrusted- types%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F835d6632d59993861a0458510402787f8a2c3cb3%0A*+Document+last+modified%3A+2023-10-25T17%3A27%3A32.0...
Mmdn_HTTP/Permissions_Policy_directives_21_9.txt
](https://www.mozilla.org/about/governance/policies/participation/) Visit [ Mozilla Corporation’s ](https://www.mozilla.org) not-for-profit parent, the [ Mozilla Foundation ](https://foundation.mozilla.org/) . Portions of this content are ©1998– 2024 by individual mozilla.org contributors. Content availabl...
Mmdn_HTTP/HTTP_headers_37_0.txt
* Skip to main content * Skip to search * Skip to select language [ MDN Web Docs ](/en-US/) Open main menu * References [ References ](/en-US/docs/Web) * [ Overview / Web Technology Web technology reference for developers ](/en-US/docs/Web) * [ HTML Structure of content on the web ](/en-US/do...
Mmdn_HTTP/HTTP_response_status_10_5.txt
418 I'm a teapot ` ](/en-US/docs/Web/HTTP/Status/418) 41. [ ` 421 Misdirected Request ` ](/en-US/docs/Web/HTTP/Status/421) 42. [ ` 422 Unprocessable Content ` ](/en-US/docs/Web/HTTP/Status/422) 43. [ ` 423 Locked ` ](/en-US/docs/Web/HTTP/Status/423) 44. [ ` 424 Failed Dependency ` ](/en-US/docs/Web/HTTP...
Mmdn_HTTP/CSP_directives_18_8.txt
ardized features (such as the security attributes ` sandbox ` or ` allow ` for ` <iframe> ` ). Therefore it is [ recommended ](https://csp.withgoogle.com/docs/strict- csp.html) to restrict this fetch-directive (e.g. explicitly set ` object-src 'none' ` if possible). CSP version | 1 ---|--- Directive type | [ ...
Mmdn_HTTP/HTTP_headers_31_8.txt
[ XSS ](/en-US/docs/Glossary/Cross- site_scripting) ) attacks. These protections are largely unnecessary in modern browsers when sites implement a strong [ ` Content-Security-Policy ` ](/en- US/docs/Web/HTTP/Headers/Content-Security-Policy) that disables the use of inline JavaScript ( ` 'unsafe-inline' ` ). **Warning:...
Mmdn_HTTP/HTTP_headers_2_2.txt
ent-Range ` ](/en-US/docs/Web/HTTP/Headers/Content-Range) 34. [ ` Content-Security-Policy ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy) 35. [ ` Content-Security-Policy-Report-Only ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy-Report-Only) 36. [ ` Content-Type ` ](/en-US/docs/Web/HTTP/...
Mmdn_HTTP/HTTP_request_methods_1_1.txt
ocol upgrade mechanism ](/en-US/docs/Web/HTTP/Protocol_upgrade_mechanism) 5. HTTP security 1. [ Content Security Policy (CSP) ](/en-US/docs/Web/HTTP/CSP) 2. [ HTTP Strict Transport Security (HSTS) ](/en-US/docs/Web/HTTP/Headers/Strict-Transport-Security) 3. [ X-Content-Type-Options ](/en-US/docs/Web/HTTP...
Mmdn_HTTP/HTTP_request_methods_2_8.txt
e of 0 in the request. Note that the client must not send content in the request, or generate fields that might include sensitive data, such as stored user credentials or cookies. Request has body | No ---|--- Successful response has body | Yes [ Safe ](/en-US/docs/Glossary/Safe/HTTP) | Yes [ Idempote...
Mmdn_HTTP/HTTP_response_status_19_1.txt
/docs/Web/HTTP/Headers/Strict-Transport-Security) 3. [ X-Content-Type-Options ](/en-US/docs/Web/HTTP/Headers/X-Content-Type-Options) 4. [ X-Frame-Options ](/en-US/docs/Web/HTTP/Headers/X-Frame-Options) 5. [ X-XSS-Protection ](/en-US/docs/Web/HTTP/Headers/X-XSS-Protection) 6. [ Mozilla web security guide...
Mmdn_HTTP/CSP_directives_26_0.txt
* Skip to main content * Skip to search * Skip to select language [ MDN Web Docs ](/en-US/) Open main menu * References [ References ](/en-US/docs/Web) * [ Overview / Web Technology Web technology reference for developers ](/en-US/docs/Web) * [ HTML Structure of content on the web ](/en-US/do...
Mmdn_HTTP/HTTP_response_status_19_3.txt
` ](/en-US/docs/Web/HTTP/Headers/Sec-CH-Prefers-Color-Scheme) Experimental 87. [ ` Sec-CH-Prefers-Reduced-Motion ` ](/en-US/docs/Web/HTTP/Headers/Sec-CH-Prefers-Reduced-Motion) Experimental 88. [ ` Sec-CH-Prefers-Reduced-Transparency ` ](/en-US/docs/Web/HTTP/Headers/Sec-CH-Prefers-Reduced-Transparency) Exper...
Mmdn_HTTP/HTTP_response_status_55_0.txt
* Skip to main content * Skip to search * Skip to select language [ MDN Web Docs ](/en-US/) Open main menu * References [ References ](/en-US/docs/Web) * [ Overview / Web Technology Web technology reference for developers ](/en-US/docs/Web) * [ HTML Structure of content on the web ](/en-US/do...
Mmdn_HTTP/List_of_HTTP_header_fields_10_1.txt
tml#limitrequestfieldsize) on May 9, 2012 . Retrieved March 13, 2012 . 11. ^ _**a** _ _**b** _ _**c** _ [ _RFC 3229_ ](https://datatracker.ietf.org/doc/html/rfc3229) . [ doi ](/wiki/Doi_\(identifier\) "Doi \(identifier\)") : [ 10.17487/RFC3229 ](https://doi.org/10.17487%2FRFC3229) . 12. ^ _**a** _ _**b** _...
Mmdn_HTTP/CSP_directives_16_5.txt
](/en-US/docs/Web/HTTP/Status/417) 40. [ ` 418 I'm a teapot ` ](/en-US/docs/Web/HTTP/Status/418) 41. [ ` 421 Misdirected Request ` ](/en-US/docs/Web/HTTP/Status/421) 42. [ ` 422 Unprocessable Content ` ](/en-US/docs/Web/HTTP/Status/422) 43. [ ` 423 Locked ` ](/en-US/docs/Web/HTTP/Status/423) 44. [ `...
Mmdn_HTTP/CSP_directives_4_9.txt
` or ` allow-top-navigation ` keyword. ## Examples http Content-Security-Policy: sandbox allow-scripts; ## Specifications Specification --- [ Content Security Policy Level 3 # directive-sandbox ](https://w3c.github.io/webappsec-csp/#directive- sandbox) ## Browser compatibility B...
Mmdn_HTTP/HTTP_response_status_44_9.txt
le under [ a Creative Commons license ](/en- US/docs/MDN/Writing_guidelines/Attrib_copyright_license) . *[ Non-standard ]: Non-standard. Check cross-browser support before using. *[ Deprecated ...
Mmdn_HTTP/List_of_HTTP_header_fields_1_1.txt
tle=List_of_HTTP_header_fields&oldid=1219780213 "Permanent link to this revision of this page") * [ Page information ](/w/index.php?title=List_of_HTTP_header_fields&action=info "More information about this page") * [ Cite this page ](/w/index.php?title=Special:CiteThisPage&page=List_of_HTTP_header_fields&id=12197...
Mmdn_HTTP/Permissions_Policy_directives_15_9.txt
/websites/) * [ Cookies ](https://www.mozilla.org/privacy/websites/#cookies) * [ Legal ](https://www.mozilla.org/about/legal/terms/mozilla) * [ Community Participation Guidelines ](https://www.mozilla.org/about/governance/policies/participation/) Visit [ Mozilla Corporation’s ](https://www.mozilla.org) not-fo...
Mmdn_HTTP/HTTP_response_status_40_0.txt
* Skip to main content * Skip to search * Skip to select language [ MDN Web Docs ](/en-US/) Open main menu * References [ References ](/en-US/docs/Web) * [ Overview / Web Technology Web technology reference for developers ](/en-US/docs/Web) * [ HTML Structure of content on the web ](/en-US/do...
Mmdn_HTTP/HTTP_response_status_11_2.txt
s/Web/HTTP/Headers/Content-Location) 33. [ ` Content-Range ` ](/en-US/docs/Web/HTTP/Headers/Content-Range) 34. [ ` Content-Security-Policy ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy) 35. [ ` Content-Security-Policy-Report-Only ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy-Report-Onl...
Mmdn_HTTP/HTTP_response_status_1_3.txt
. [ ` Sec-CH-Prefers-Reduced-Motion ` ](/en-US/docs/Web/HTTP/Headers/Sec-CH-Prefers-Reduced-Motion) Experimental 88. [ ` Sec-CH-Prefers-Reduced-Transparency ` ](/en-US/docs/Web/HTTP/Headers/Sec-CH-Prefers-Reduced-Transparency) Experimental 89. [ ` Sec-CH-UA ` ](/en-US/docs/Web/HTTP/Headers/Sec-CH-UA) Experime...
Mmdn_HTTP/HTTP_headers_35_8.txt
Forbidden header name ](/en-US/docs/Glossary/Forbidden_header_name) | yes ## Syntax http Access-Control-Request-Method: <method> ## Directives <method> One of the [ HTTP request methods ](/en-US/docs/Web/HTTP/Methods) , for example [ ` GET ` ](/en-US/docs/Web/HTTP/Methods/GET) , [...
Mmdn_HTTP/HTTP_response_status_3_4.txt
[ ` WWW-Authenticate ` ](/en-US/docs/Web/HTTP/Headers/WWW-Authenticate) 131. [ ` X-Content-Type-Options ` ](/en-US/docs/Web/HTTP/Headers/X-Content-Type-Options) 132. [ ` X-DNS-Prefetch-Control ` ](/en-US/docs/Web/HTTP/Headers/X-DNS-Prefetch-Control) Non-standard 133. [ ` X-Forwarded-For ` ](/en-US/docs/We...
Mmdn_HTTP/CSP_directives_13_6.txt
urity-Policy/script-src) 24. [ ` CSP: script-src-attr ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/script-src-attr) 25. [ ` CSP: script-src-elem ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/script-src-elem) 26. [ ` CSP: style-src ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Poli...
Mmdn_HTTP/HTTP_headers_27_5.txt
US/docs/Web/HTTP/Status/426) 47. [ ` 428 Precondition Required ` ](/en-US/docs/Web/HTTP/Status/428) 48. [ ` 429 Too Many Requests ` ](/en-US/docs/Web/HTTP/Status/429) 49. [ ` 431 Request Header Fields Too Large ` ](/en-US/docs/Web/HTTP/Status/431) 50. [ ` 451 Unavailable For Legal Reasons ` ](/en-US/doc...
Mmdn_HTTP/HTTP_headers_24_5.txt
Upgrade Required ` ](/en-US/docs/Web/HTTP/Status/426) 47. [ ` 428 Precondition Required ` ](/en-US/docs/Web/HTTP/Status/428) 48. [ ` 429 Too Many Requests ` ](/en-US/docs/Web/HTTP/Status/429) 49. [ ` 431 Request Header Fields Too Large ` ](/en-US/docs/Web/HTTP/Status/431) 50. [ ` 451 Unavailable For Le...
Mmdn_HTTP/HTTP_response_status_17_4.txt
h) Non-standard Deprecated 130. [ ` WWW-Authenticate ` ](/en-US/docs/Web/HTTP/Headers/WWW-Authenticate) 131. [ ` X-Content-Type-Options ` ](/en-US/docs/Web/HTTP/Headers/X-Content-Type-Options) 132. [ ` X-DNS-Prefetch-Control ` ](/en-US/docs/Web/HTTP/Headers/X-DNS-Prefetch-Control) Non-standard 133. [...
Mmdn_HTTP/HTTP_response_status_45_2.txt
th ` ](/en-US/docs/Web/HTTP/Headers/Content-Length) 32. [ ` Content-Location ` ](/en-US/docs/Web/HTTP/Headers/Content-Location) 33. [ ` Content-Range ` ](/en-US/docs/Web/HTTP/Headers/Content-Range) 34. [ ` Content-Security-Policy ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy) 35. [ ` Content-...
Mmdn_HTTP/HTTP_response_status_39_3.txt
en-US/docs/Web/HTTP/Headers/RTT) Experimental 84. [ ` Save-Data ` ](/en-US/docs/Web/HTTP/Headers/Save-Data) Experimental 85. [ ` Sec-Browsing-Topics ` ](/en-US/docs/Web/HTTP/Headers/Sec-Browsing-Topics) Experimental Non-standard 86. [ ` Sec-CH-Prefers-Color-Scheme ` ](/en-US/docs/Web/HTTP/Headers/Sec-CH...
Mmdn_HTTP/CSP_directives_28_8.txt
anifest-src <source>; Content-Security-Policy: manifest-src <source> <source>; ### Sources ` <source> ` can be any one of the values listed in [ CSP Source Values ](/en- US/docs/Web/HTTP/Headers/Content-Security-Policy/Sources#sources) . Note that this same set of values can be used in all [ fetch directiv...
Mmdn_HTTP/Permissions_Policy_directives_1_1.txt
Policy (CSP) ](/en-US/docs/Web/HTTP/CSP) 2. [ HTTP Strict Transport Security (HSTS) ](/en-US/docs/Web/HTTP/Headers/Strict-Transport-Security) 3. [ X-Content-Type-Options ](/en-US/docs/Web/HTTP/Headers/X-Content-Type-Options) 4. [ X-Frame-Options ](/en-US/docs/Web/HTTP/Headers/X-Frame-Options) 5. [ X-XS...
Mmdn_HTTP/HTTP_request_methods_5_7.txt
10. [ Permissions-Policy: encrypted-media ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/encrypted-media) Experimental 11. [ Permissions-Policy: execution-while-not-rendered ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/execution-while-not-rendered) Experimental 12. [ Permissions-Policy: execution-wh...
Mmdn_HTTP/HTTP_response_status_53_6.txt
P/Headers/Content-Security-Policy/script-src) 24. [ ` CSP: script-src-attr ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/script-src-attr) 25. [ ` CSP: script-src-elem ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/script-src-elem) 26. [ ` CSP: style-src ` ](/en-US/docs/Web/HTTP/Headers/...
Mmdn_HTTP/Permissions_Policy_directives_5_3.txt
s/Web/HTTP/Headers/Sec-CH-Prefers-Color-Scheme) Experimental 87. [ ` Sec-CH-Prefers-Reduced-Motion ` ](/en-US/docs/Web/HTTP/Headers/Sec-CH-Prefers-Reduced-Motion) Experimental 88. [ ` Sec-CH-Prefers-Reduced-Transparency ` ](/en-US/docs/Web/HTTP/Headers/Sec-CH-Prefers-Reduced-Transparency) Experimental 89...
Mmdn_HTTP/Permissions_Policy_directives_4_6.txt
style-src) 27. [ ` CSP: style-src-attr ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/style-src-attr) 28. [ ` CSP: style-src-elem ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/style-src-elem) 29. [ ` CSP: trusted-types ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/trusted-typ...
Mmdn_HTTP/HTTP_response_status_18_6.txt
26. [ ` CSP: style-src ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/style-src) 27. [ ` CSP: style-src-attr ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/style-src-attr) 28. [ ` CSP: style-src-elem ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/style-src-elem) 29. [ ` CSP: t...
Mmdn_HTTP/Permissions_Policy_directives_3_1.txt
ct-Transport-Security) 3. [ X-Content-Type-Options ](/en-US/docs/Web/HTTP/Headers/X-Content-Type-Options) 4. [ X-Frame-Options ](/en-US/docs/Web/HTTP/Headers/X-Frame-Options) 5. [ X-XSS-Protection ](/en-US/docs/Web/HTTP/Headers/X-XSS-Protection) 6. [ Mozilla web security guidelines ](https://wiki.mozill...
Mmdn_HTTP/Permissions_Policy_directives_13_8.txt
cript/Reference/Global_Objects/Promise) that rejects with a [ ` TypeError ` ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypeError) . **Note:** If both this directive (i.e. via the ` allow ` attribute) and the ` allowfullscreen ` attribute are present on an ` <iframe> ` element, this directive takes precedenc...
Mmdn_HTTP/Permissions_Policy_directives_35_4.txt
ders/X-DNS-Prefetch-Control) Non-standard 133. [ ` X-Forwarded-For ` ](/en-US/docs/Web/HTTP/Headers/X-Forwarded-For) Non-standard 134. [ ` X-Forwarded-Host ` ](/en-US/docs/Web/HTTP/Headers/X-Forwarded-Host) Non-standard 135. [ ` X-Forwarded-Proto ` ](/en-US/docs/Web/HTTP/Headers/X-Forwarded-Proto) Non-st...
Mmdn_HTTP/CSP_directives_25_0.txt
* Skip to main content * Skip to search * Skip to select language [ MDN Web Docs ](/en-US/) Open main menu * References [ References ](/en-US/docs/Web) * [ Overview / Web Technology Web technology reference for developers ](/en-US/docs/Web) * [ HTML Structure of content on the web ](/en-US/do...
Mmdn_HTTP/HTTP_headers_23_6.txt
tent-Security-Policy/style-src-attr) 28. [ ` CSP: style-src-elem ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/style-src-elem) 29. [ ` CSP: trusted-types ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/trusted-types) Experimental 30. [ ` CSP: upgrade-insecure-requests ` ](/en-US/docs/We...
Mmdn_HTTP/List_of_HTTP_header_fields_6_1.txt
the request body. | ` Content-MD5: Q2hlY2sgSW50ZWdyaXR5IQ== ` | Obsolete [15] | [ RFC ](/wiki/RFC_\(identifier\) "RFC \(identifier\)") [ 1544 ](https://datatracker.ietf.org/doc/html/rfc1544) , [ 1864 ](https://datatracker.ietf.org/doc/html/rfc1864) , [ 4021 ](https://datatracker.ietf.org/doc/html/rfc4021) Cont...
Mmdn_HTTP/HTTP_response_status_27_3.txt
ata ` ](/en-US/docs/Web/HTTP/Headers/Save-Data) Experimental 85. [ ` Sec-Browsing-Topics ` ](/en-US/docs/Web/HTTP/Headers/Sec-Browsing-Topics) Experimental Non-standard 86. [ ` Sec-CH-Prefers-Color-Scheme ` ](/en-US/docs/Web/HTTP/Headers/Sec-CH-Prefers-Color-Scheme) Experimental 87. [ ` Sec-CH-Prefers-R...
Mmdn_HTTP/CSP_directives_6_2.txt
/HTTP/Headers/Content-Length) 32. [ ` Content-Location ` ](/en-US/docs/Web/HTTP/Headers/Content-Location) 33. [ ` Content-Range ` ](/en-US/docs/Web/HTTP/Headers/Content-Range) 34. [ ` Content-Security-Policy ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy) 35. [ ` Content-Security-Policy-Report...
Mmdn_HTTP/CSP_directives_5_0.txt
* Skip to main content * Skip to search * Skip to select language [ MDN Web Docs ](/en-US/) Open main menu * References [ References ](/en-US/docs/Web) * [ Overview / Web Technology Web technology reference for developers ](/en-US/docs/Web) * [ HTML Structure of content on the web ](/en-US/do...
Mmdn_HTTP/CSP_directives_25_7.txt
ermissions-Policy: encrypted-media ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/encrypted-media) Experimental 11. [ Permissions-Policy: execution-while-not-rendered ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/execution-while-not-rendered) Experimental 12. [ Permissions-Policy: execution-while-out-o...
Mmdn_HTTP/HTTP_headers_2_7.txt
ntal 11. [ Permissions-Policy: execution-while-not-rendered ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/execution-while-not-rendered) Experimental 12. [ Permissions-Policy: execution-while-out-of-viewport ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/execution-while-out-of-viewport) Experimental ...
Mmdn_HTTP/CSP_directives_4_10.txt
dard. Check cross-browser support before using. *[ Deprecated ]: Deprecated. Not for use in new websites. *[ Experimental ]: Experimental. Expect behavior to change in the future. *[...
Mmdn_HTTP/Permissions_Policy_directives_2_8.txt
t, the Geolocation API can be used within top-level documents and their same-origin child frames. This directive allows or prevents cross-origin frames from accessing geolocation. This includes same-origin frames. ## Syntax http Permissions-Policy: geolocation=<allowlist>; ` <allowlist> ` ...
Mmdn_HTTP/Header_Field_Definitions_13_1.txt
stale directive (which has a similar effect), the protocol also includes a mechanism for the origin server to require revalidation of a cache entry on any subsequent use. When the must-revalidate directive is present in a response received by a cache, that cache MUST NOT use the entry after it becomes stale to respond ...
Mmdn_HTTP/Permissions_Policy_directives_13_9.txt
ub.com/mdn/) * [ MDN Blog RSS Feed ](/en-US/blog/rss.xml) ## MDN * [ About ](/en-US/about) * [ Blog ](/en-US/blog/) * [ Careers ](https://www.mozilla.org/en-US/careers/listings/?team=ProdOps) * [ Advertise with us ](/en-US/advertising) ## Support * [ Product help ](https://support.mozilla.org/product...
Mmdn_HTTP/HTTP_response_status_52_5.txt
` 421 Misdirected Request ` ](/en-US/docs/Web/HTTP/Status/421) 42. _[ ` 422 Unprocessable Content ` ](/en-US/docs/Web/HTTP/Status/422) _ 43. [ ` 423 Locked ` ](/en-US/docs/Web/HTTP/Status/423) 44. [ ` 424 Failed Dependency ` ](/en-US/docs/Web/HTTP/Status/424) 45. [ ` 425 Too Early ` ](/en-US/docs/Web/H...
Mmdn_HTTP/Permissions_Policy_directives_17_1.txt
1. [ Content Security Policy (CSP) ](/en-US/docs/Web/HTTP/CSP) 2. [ HTTP Strict Transport Security (HSTS) ](/en-US/docs/Web/HTTP/Headers/Strict-Transport-Security) 3. [ X-Content-Type-Options ](/en-US/docs/Web/HTTP/Headers/X-Content-Type-Options) 4. [ X-Frame-Options ](/en-US/docs/Web/HTTP/Headers/X-Fra...
Mmdn_HTTP/HTTP_response_status_56_4.txt
tch-Control ` ](/en-US/docs/Web/HTTP/Headers/X-DNS-Prefetch-Control) Non-standard 133. [ ` X-Forwarded-For ` ](/en-US/docs/Web/HTTP/Headers/X-Forwarded-For) Non-standard 134. [ ` X-Forwarded-Host ` ](/en-US/docs/Web/HTTP/Headers/X-Forwarded-Host) Non-standard 135. [ ` X-Forwarded-Proto ` ](/en-US/docs/We...
Mmdn_HTTP/HTTP_request_methods_3_2.txt
nguage) 31. [ ` Content-Length ` ](/en-US/docs/Web/HTTP/Headers/Content-Length) 32. [ ` Content-Location ` ](/en-US/docs/Web/HTTP/Headers/Content-Location) 33. [ ` Content-Range ` ](/en-US/docs/Web/HTTP/Headers/Content-Range) 34. [ ` Content-Security-Policy ` ](/en-US/docs/Web/HTTP/Headers/Content-Secur...
Mmdn_HTTP/HTTP_response_status_23_2.txt
` ](/en-US/docs/Web/HTTP/Headers/Content-Location) 33. [ ` Content-Range ` ](/en-US/docs/Web/HTTP/Headers/Content-Range) 34. [ ` Content-Security-Policy ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy) 35. [ ` Content-Security-Policy-Report-Only ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Po...