Not yet stable

For a given set of browsers, what APIs are not yet in all of them.

Example Comparisons
Browsers
Features

Summary

A count of the number of APIs are in Browser X but not in Browser Y.
Not in ChromeNot in Chrome Android
In Chrome 10
In Chrome Android 3

Unstable APIs

Below is a list of features that are not in all of Chrome and Chrome Android

Raw Data

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HTML Data

API First Browser Date Days in Limbo Notes
html.elements.hr.hr_in_select Chrome10/31/20231006
Chrome: Only exposes the <hr> visually in the page when the menu is expanded (arrowing within the collapsed menu does not show them).Chrome: Does not expose the <hr> within the accessibility tree.Edge: Only exposes the <hr> visually in the page when the menu is expanded (arrowing within the collapsed menu does not show them).Edge: Does not expose the <hr> within the accessibility tree.Firefox: Does not expose the <hr> within the accessibility tree.Firefox for Android: Does not expose the <hr> within the accessibility tree.Opera: Only exposes the <hr> visually in the page when the menu is expanded (arrowing within the collapsed menu does not show them).Opera: Does not expose the <hr> within the accessibility tree.Safari: Does not expose the <hr> within the accessibility tree.Safari on iOS: Does not expose the <hr> within the accessibility tree.WebView on iOS: Does not expose the <hr> within the accessibility tree.
html.elements.iframe.allow.compute-pressure 📋Chrome5/14/2024810
html.elements.iframe.allow.document-domain 📋Chrome1/23/20183113
html.elements.iframe.allow.local-fonts 📋Chrome6/21/20221503
html.elements.iframe.allow.picture-in-picture 📋Chrome12/4/20182798
html.elements.input.capture 📋Chrome Android2/27/20134904
html.elements.select.hr_in_select Chrome10/31/20231006
Chrome: Only exposes the <hr> visually in the page when the menu is expanded (arrowing within the collapsed menu does not show them).Chrome: Does not expose the <hr> within the accessibility tree.Edge: Only exposes the <hr> visually in the page when the menu is expanded (arrowing within the collapsed menu does not show them).Edge: Does not expose the <hr> within the accessibility tree.Firefox: Does not expose the <hr> within the accessibility tree.Firefox for Android: Does not expose the <hr> within the accessibility tree.Opera: Only exposes the <hr> visually in the page when the menu is expanded (arrowing within the collapsed menu does not show them).Opera: Does not expose the <hr> within the accessibility tree.Safari: Does not expose the <hr> within the accessibility tree.Safari on iOS: Does not expose the <hr> within the accessibility tree.WebView on iOS: Does not expose the <hr> within the accessibility tree.
html.elements.select.size 📋Chrome12/11/20086443
html.manifest.file_handlers 📋Chrome5/24/20221531
html.manifest.note_taking 📋Chrome10/19/20211748
html.manifest.note_taking.new_note_url 📋Chrome10/19/20211748
html.manifest.prefer_related_applications 📋Chrome Android7/29/20154022
Chrome: prefer_related_applications must be false or not present for a web app to be installable.Edge: prefer_related_applications must be false or not present for a web app to be installable.Firefox for Android: The property parses, but has no effect.Opera: prefer_related_applications must be false or not present for a web app to be installable.
html.manifest.related_applications 📋Chrome Android7/29/20154022
Firefox for Android: The property parses, but has no effect.