Experimental

For a given set of browsers what APIs are still considred experimental, and how long have they been experimental?

Example Comparisons
Browsers
Features

Summary

Experimental APIs

Below is a list of features that are marked as "Experimental" in Chrome and Edge

Raw Data

Quick Links:

HTTP Data

API First Browser Date Last Browser Date Days in experimentation Notes
http.headers.Accept-CH.Device-Memory Chrome9/5/2017 Edge1/15/2020862
http.headers.Accept-CH.Sec-CH-UA Chrome3/2/2021 Edge3/4/20212
http.headers.Accept-CH.Sec-CH-UA-Arch Chrome3/2/2021 Edge3/4/20212
http.headers.Accept-CH.Sec-CH-UA-Full-Version Chrome3/2/2021 Edge3/4/20212
http.headers.Accept-CH.Sec-CH-UA-Mobile Chrome3/2/2021 Edge3/4/20212
http.headers.Accept-CH.Sec-CH-UA-Model Chrome3/2/2021 Edge3/4/20212
http.headers.Accept-CH.Sec-CH-UA-Platform Chrome3/2/2021 Edge3/4/20212
http.headers.Accept-CH.Sec-CH-UA-Platform-Version Chrome3/2/2021 Edge3/4/20212
http.headers.Attribution-Reporting-Eligible 📋Chrome9/12/2023 Edge9/15/20233
http.headers.Attribution-Reporting-Register-Source 📋Chrome9/12/2023 Edge9/15/20233
http.headers.Attribution-Reporting-Register-Trigger 📋Chrome9/12/2023 Edge9/15/20233
http.headers.Attribution-Reporting-Support 📋Chrome9/12/2023 Edge9/15/20233
http.headers.Clear-Site-Data.clientHints 📋Chrome9/12/2023 Edge9/15/20233
http.headers.Content-Security-Policy.fenced-frame-src 📋Chrome7/18/2023 Edge7/21/20233
http.headers.Content-Security-Policy.require-trusted-types-for 📋Chrome5/19/2020 Edge5/21/20202
http.headers.Content-Security-Policy.script-src.inline-speculation-rules 📋Chrome2/7/2023 Edge2/9/20232
http.headers.Content-Security-Policy.trusted-types 📋Chrome5/19/2020 Edge5/21/20202
http.headers.Critical-CH 📋Chrome5/25/2021 Edge5/27/20212
http.headers.Cross-Origin-Opener-Policy.noopener-allow-popups 📋Chrome11/12/2024 Edge11/14/20242
http.headers.Downlink 📋Chrome5/29/2018 Edge1/15/2020596
Chrome: The value is never greater than 10 Mbps, as a non-standard anti-fingerprinting measure.Chrome Android: The value is never greater than 10 Mbps, as a non-standard anti-fingerprinting measure.Edge: The value is never greater than 10 Mbps, as a non-standard anti-fingerprinting measure.Quest Browser: The value is never greater than 10 Mbps, as a non-standard anti-fingerprinting measure.Opera: The value is never greater than 10 Mbps, as a non-standard anti-fingerprinting measure.Opera Android: The value is never greater than 10 Mbps, as a non-standard anti-fingerprinting measure.Samsung Internet: The value is never greater than 10 Mbps, as a non-standard anti-fingerprinting measure.WebView Android: The value is never greater than 10 Mbps, as a non-standard anti-fingerprinting measure.
http.headers.ECT 📋Chrome5/29/2018 Edge1/15/2020596
http.headers.Link.blocking 📋Edge9/1/2022 Chrome9/2/20221
http.headers.Link.expect 📋Chrome4/16/2024 Edge4/18/20242
http.headers.NEL 📋Chrome12/4/2018 Edge1/15/2020407
http.headers.No-Vary-Search 📋Chrome7/23/2024 Edge7/25/20242
Chrome: Supported for navigation prefetch cache only.Chrome Android: Supported for navigation prefetch cache only.Edge: Supported for navigation prefetch cache only.Opera: Supported for navigation prefetch cache only.Opera Android: Supported for navigation prefetch cache only.Samsung Internet: Supported for navigation prefetch cache only.WebView Android: Supported for navigation prefetch cache only.
http.headers.Observe-Browsing-Topics Chrome7/18/2023 Edge7/21/20233
http.headers.Origin-Agent-Cluster 📋Chrome4/13/2021 Edge4/15/20212
http.headers.Permissions-Policy 📋Chrome1/19/2021 Edge1/21/20212
http.headers.Permissions-Policy.accelerometer 📋Chrome4/17/2018 Edge1/15/2020638
http.headers.Permissions-Policy.ambient-light-sensor 📋Chrome4/17/2018 Edge1/15/2020638
http.headers.Permissions-Policy.attribution-reporting 📋Chrome9/12/2023 Edge9/15/20233
http.headers.Permissions-Policy.autoplay 📋Chrome1/23/2018 Edge1/15/2020722
http.headers.Permissions-Policy.bluetooth 📋Chrome8/2/2022 Edge8/5/20223
http.headers.Permissions-Policy.browsing-topics Chrome7/18/2023 Edge7/21/20233
http.headers.Permissions-Policy.camera 📋Chrome1/23/2018 Edge1/15/2020722
http.headers.Permissions-Policy.compute-pressure 📋Chrome5/14/2024 Edge5/17/20243
http.headers.Permissions-Policy.cross-origin-isolated 📋Chrome11/17/2020 Edge11/19/20202
http.headers.Permissions-Policy.display-capture 📋Chrome9/21/2021 Edge9/24/20213
http.headers.Permissions-Policy.document-domain 📋Chrome1/23/2018 Edge1/15/2020722
http.headers.Permissions-Policy.encrypted-media 📋Chrome1/23/2018 Edge1/15/2020722
http.headers.Permissions-Policy.fullscreen 📋Chrome10/17/2017 Edge1/15/2020820
http.headers.Permissions-Policy.geolocation 📋Chrome1/23/2018 Edge1/15/2020722
http.headers.Permissions-Policy.gyroscope 📋Chrome4/17/2018 Edge1/15/2020638
http.headers.Permissions-Policy.hid 📋Chrome3/2/2021 Edge3/4/20212
http.headers.Permissions-Policy.identity-credentials-get 📋Chrome2/7/2023 Edge2/9/20232
http.headers.Permissions-Policy.idle-detection 📋Chrome9/21/2021 Edge9/24/20213
http.headers.Permissions-Policy.local-fonts 📋Chrome6/21/2022 Edge6/23/20222
http.headers.Permissions-Policy.magnetometer 📋Chrome4/17/2018 Edge1/15/2020638
http.headers.Permissions-Policy.microphone 📋Chrome1/23/2018 Edge1/15/2020722
http.headers.Permissions-Policy.midi 📋Chrome1/23/2018 Edge1/15/2020722
http.headers.Permissions-Policy.otp-credentials 📋Chrome8/31/2021 Edge9/2/20212
http.headers.Permissions-Policy.payment 📋Chrome7/25/2017 Edge1/15/2020904
http.headers.Permissions-Policy.picture-in-picture 📋Chrome12/4/2018 2798
http.headers.Permissions-Policy.publickey-credentials-create 📋Edge7/16/2020 Chrome7/27/202011
http.headers.Permissions-Policy.publickey-credentials-get 📋Edge7/16/2020 Chrome7/27/202011
http.headers.Permissions-Policy.screen-wake-lock 📋Edge7/16/2020 Chrome7/27/202011
http.headers.Permissions-Policy.serial 📋Chrome3/2/2021 Edge3/4/20212
http.headers.Permissions-Policy.storage-access 📋Chrome5/2/2023 Edge5/5/20233
http.headers.Permissions-Policy.usb 📋Chrome7/25/2017 Edge1/15/2020904
http.headers.Permissions-Policy.web-share 📋Edge10/9/2020 Chrome10/20/202011
http.headers.Permissions-Policy.wildcards Chrome11/29/2022 Edge12/5/20226
http.headers.Permissions-Policy.window-management 📋Chrome3/29/2022 Edge4/1/20223
http.headers.Permissions-Policy.xr-spatial-tracking 📋Chrome12/10/2019 Edge1/15/202036
http.headers.RTT 📋Chrome5/29/2018 Edge1/15/2020596
Chrome: The value is never greater than 3000 ms, as a non-standard anti-fingerprinting measure.Chrome Android: The value is never greater than 3000 ms, as a non-standard anti-fingerprinting measure.Edge: The value is never greater than 3000 ms, as a non-standard anti-fingerprinting measure.Quest Browser: The value is never greater than 3000 ms, as a non-standard anti-fingerprinting measure.Opera: The value is never greater than 3000 ms, as a non-standard anti-fingerprinting measure.Opera Android: The value is never greater than 3000 ms, as a non-standard anti-fingerprinting measure.Samsung Internet: The value is never greater than 3000 ms, as a non-standard anti-fingerprinting measure.WebView Android: The value is never greater than 3000 ms, as a non-standard anti-fingerprinting measure.
http.headers.Reporting-Endpoints 📋Chrome11/15/2021 Edge11/19/20214
http.headers.Save-Data 📋Chrome3/2/2016 Edge1/15/20201414
http.headers.Sec-Browsing-Topics Chrome7/18/2023 Edge7/21/20233
http.headers.Sec-CH-Prefers-Color-Scheme 📋Chrome8/31/2021 Edge9/2/20212
http.headers.Sec-CH-Prefers-Reduced-Motion 📋Chrome11/29/2022 Edge12/5/20226
http.headers.Sec-CH-Prefers-Reduced-Transparency 📋Chrome10/31/2023 Edge11/2/20232
http.headers.Sec-CH-UA 📋Chrome3/2/2021 Edge3/4/20212
http.headers.Sec-CH-UA-Arch 📋Chrome3/2/2021 Edge3/4/20212
http.headers.Sec-CH-UA-Bitness 📋Chrome8/31/2021 Edge9/2/20212
http.headers.Sec-CH-UA-Full-Version-List 📋Chrome2/1/2022 Edge2/3/20222
http.headers.Sec-CH-UA-Mobile 📋Chrome3/2/2021 Edge3/4/20212
http.headers.Sec-CH-UA-Model 📋Chrome3/2/2021 Edge3/4/20212
http.headers.Sec-CH-UA-Platform 📋Chrome3/2/2021 Edge3/4/20212
http.headers.Sec-CH-UA-Platform-Version 📋Chrome3/2/2021 Edge3/4/20212
http.headers.Sec-Fetch-Dest.fencedframe Chrome7/18/2023 Edge7/21/20233
http.headers.Set-Login 📋Chrome12/5/2023 Edge12/7/20232
http.headers.Speculation-Rules 📋Chrome1/23/2024 Edge1/25/20242
http.headers.Supports-Loading-Mode 📋Chrome1/10/2023 Edge1/12/20232
http.headers.Supports-Loading-Mode.credentialed-prerender Chrome1/10/2023 Edge1/12/20232
http.headers.Supports-Loading-Mode.fenced-frames Chrome9/12/2023 Edge9/15/20233