For a given set of browsers, what APIs are not yet in all of them.
| Not in Firefox | Not in Safari | |
|---|---|---|
| In Firefox | 27 | |
| In Safari | 38 |
Below is a list of features that are not in all of Firefox and Safari
| API | First Browser | Date | Days in Limbo | Notes |
|---|---|---|---|---|
| html.elements.a.attributionsourceid 📋 | Safari | 4/26/2021 | 2008 | |
| html.elements.a.coords 📋 | Safari | 6/23/2003 | 8525 | Firefox: You can no longer nest an <a> element inside a <map> element to create a hotspot region - coords and shape attribute support removed.Firefox for Android: You can no longer nest an <a> element inside a <map> element to create a hotspot region - coords and shape attribute support removed. |
| html.elements.a.href.href_sms | Firefox | 4/24/2012 | 5297 | |
| html.elements.a.shape 📋 | Safari | 6/23/2003 | 8525 | Firefox: You can no longer nest an <a> element inside a <map> element to create a hotspot region - coords and shape attribute support removed.Firefox for Android: You can no longer nest an <a> element inside a <map> element to create a hotspot region - coords and shape attribute support removed. |
| html.elements.audio.disableremoteplayback 📋 | Safari | 3/24/2020 | 2406 | |
| html.elements.canvas.moz-opaque | Firefox | 6/30/2009 | 6326 | |
| html.elements.col.char 📋 | Safari | 10/26/2007 | 6939 | |
| html.elements.col.charoff 📋 | Safari | 10/26/2007 | 6939 | |
| html.elements.colgroup.char 📋 | Safari | 10/26/2007 | 6939 | |
| html.elements.colgroup.charoff 📋 | Safari | 10/26/2007 | 6939 | |
| html.elements.form.autocomplete.new-password | Firefox | 5/21/2019 | 2714 | |
| html.elements.iframe.allow.autoplay 📋 | Firefox | 3/10/2020 | 2420 | |
| html.elements.iframe.allow.document-domain 📋 | Firefox | 3/10/2020 | 2420 | |
| html.elements.iframe.allow.encrypted-media 📋 | Firefox | 3/10/2020 | 2420 | |
| html.elements.iframe.allow.fullscreen 📋 | Firefox | 8/25/2020 | 2252 | |
| html.elements.iframe.allow.gamepad 📋 | Firefox | 8/10/2021 | 1902 | Firefox: The default allowlist is * instead of self (as required by the specification).Firefox for Android: The default allowlist is * instead of self (as required by the specification). |
| html.elements.iframe.allow.geolocation 📋 | Firefox | 3/10/2020 | 2420 | |
| html.elements.iframe.allow.midi 📋 | Firefox | 3/10/2020 | 2420 | |
| html.elements.iframe.allow.payment 📋 | Firefox | 3/10/2020 | 2420 | |
| html.elements.iframe.allow.publickey-credentials-create 📋 | Firefox | 2/20/2024 | 978 | |
| html.elements.iframe.allow.publickey-credentials-get 📋 | Firefox | 9/26/2023 | 1125 | |
| html.elements.iframe.allow.speaker-selection 📋 | Firefox | 8/1/2023 | 1181 | Firefox for Android: Not available due to a limitation in Android (see bug 1473346). |
| html.elements.iframe.allow.web-share 📋 | Firefox | 9/22/2020 | 2224 | Firefox: Firefox recognizes the web-share permissions policy, but this has no effect in versions of Firefox that do not support the share() method.Firefox for Android: Firefox for Android recognizes the web-share permissions policy, but this has no effect in versions of Firefox for Android that do not support the share() method. |
| html.elements.iframe.sandbox.allow-orientation-lock 📋 | Firefox | 9/20/2016 | 3687 | |
| html.elements.iframe.sandbox.allow-presentation 📋 | Firefox | 11/15/2016 | 3631 | |
| html.elements.input.type_password.insecure_login_handling | Firefox | 3/7/2017 | 3519 | |
| html.elements.link.blocking 📋 | Safari | 12/11/2024 | 683 | |
| html.elements.link.rel.alternate_stylesheet 📋 | Firefox | 6/17/2008 | 6704 | |
| html.elements.link.rel.manifest 📋 | Safari | 9/18/2023 | 1133 | |
| html.elements.link.rel.preload.as-track | Safari | 4/12/2018 | 3118 | |
| html.elements.meta.name.theme-color 📋 | Safari | 9/20/2021 | 1861 | Chrome: Chrome uses the color only on installed progressive web apps.Chrome: Chrome reports support, but does not actually use the color anywhere.Chrome Android: Chrome for Android does not use the color on devices with native dark mode enabled unless it's an installed progressive web app or a trusted web activity.Edge: Edge uses the color only on installed progressive web apps.Quest Browser: Chrome for Android does not use the color on devices with native dark mode enabled unless it's an installed progressive web app or a trusted web activity. |
| html.elements.script.blocking 📋 | Safari | 12/11/2024 | 683 | |
| html.elements.script.type.importmap.integrity 📋 | Safari | 9/16/2024 | 769 | |
| html.elements.style.blocking 📋 | Safari | 12/11/2024 | 683 | |
| html.elements.summary.display_list_item | Firefox | 9/20/2016 | 3687 | |
| html.elements.tbody.char | Safari | 6/8/2009 | 6348 | |
| html.elements.td.char | Safari | 6/8/2009 | 6348 | |
| html.elements.td.rowspan.rowspan_zero | Firefox | 8/8/2017 | 3365 | |
| html.elements.template.shadowrootclonable 📋 | Firefox | 4/16/2024 | 922 | |
| html.elements.template.shadowrootdelegatesfocus 📋 | Firefox | 2/20/2024 | 978 | |
| html.elements.textarea.autocomplete.new-password | Firefox | 5/21/2019 | 2714 | |
| html.elements.tfoot.char | Safari | 6/8/2009 | 6348 | |
| html.elements.th.char | Safari | 6/8/2009 | 6348 | |
| html.elements.th.rowspan.rowspan_zero | Firefox | 8/8/2017 | 3365 | |
| html.elements.thead.char | Safari | 6/8/2009 | 6348 | |
| html.elements.tr.char | Safari | 6/8/2009 | 6348 | |
| html.elements.tr.charoff | Safari | 6/8/2009 | 6348 | |
| html.elements.video.disableremoteplayback 📋 | Safari | 3/24/2020 | 2406 | |
| html.elements.video.playsinline 📋 | Safari | 9/20/2016 | 3687 | |
| html.global_attributes.autocapitalize 📋 | Firefox | 3/14/2023 | 1321 | |
| html.global_attributes.autocorrect 📋 | Safari | 4/26/2021 | 2008 | Safari: Takes values of true/false (instead of on/off).Safari: Allowed on <input type='password'> elements.Safari on iOS: Takes values of true/false (instead of on/off).Safari on iOS: Allowed on <input type='password'> elements. |
| html.global_attributes.contenteditable.plaintext-only | Safari | 3/24/2020 | 2406 | |
| html.global_attributes.is 📋 | Firefox | 10/23/2018 | 2924 | |
| html.global_attributes.writingsuggestions 📋 | Safari | 9/16/2024 | 769 | |
| html.manifest.display 📋 | Safari | 9/18/2023 | 1133 | Chrome: display and/or display_override are required for a web app to be installable.Chrome Android: display and/or display_override are required for a web app to be installable.Edge: display and/or display_override are required for a web app to be installable.Quest Browser: display and/or display_override are required for a web app to be installable.Opera: display and/or display_override are required for a web app to be installable.Opera Android: display and/or display_override are required for a web app to be installable.Samsung Internet: display and/or display_override are required for a web app to be installable.WebView Android: display and/or display_override are required for a web app to be installable. |
| html.manifest.display.browser 📋 | Safari | 9/18/2023 | 1133 | |
| html.manifest.display.standalone 📋 | Safari | 9/18/2023 | 1133 | |
| html.manifest.icons 📋 | Safari | 9/18/2023 | 1133 | Chrome: icons is required for a web app to be installable.Chrome Android: icons is required for a web app to be installable.Edge: icons is required for a web app to be installable.Quest Browser: icons is required for a web app to be installable.Opera: icons is required for a web app to be installable.Opera Android: icons is required for a web app to be installable.Safari: Only used when no apple-touch-icon is present and either "purpose" is set to "any" or "purpose" is not specified.Safari on iOS: Only used when no apple-touch-icon is present and either "purpose" is set to "any" or "purpose" is not specified.Samsung Internet: icons is required for a web app to be installable.WebView Android: icons is required for a web app to be installable.WebView on iOS: Only used when no apple-touch-icon is present and either "purpose" is set to "any" or "purpose" is not specified. |
| html.manifest.id 📋 | Safari | 9/18/2023 | 1133 | Firefox: The property parses, but has no effect. |
| html.manifest.name 📋 | Safari | 9/18/2023 | 1133 | Chrome: name or short_name is required for a web app to be installable.Chrome Android: name or short_name is required for a web app to be installable.Edge: name or short_name is required for a web app to be installable.Quest Browser: name or short_name is required for a web app to be installable.Opera: name or short_name is required for a web app to be installable.Opera Android: name or short_name is required for a web app to be installable.Samsung Internet: name or short_name is required for a web app to be installable.WebView Android: name or short_name is required for a web app to be installable. |
| html.manifest.scope 📋 | Safari | 9/18/2023 | 1133 | |
| html.manifest.short_name 📋 | Safari | 9/18/2023 | 1133 | Chrome: short_name or name is required for a web app to be installable.Chrome Android: short_name or name is required for a web app to be installable.Edge: short_name or name is required for a web app to be installable.Quest Browser: short_name or name is required for a web app to be installable.Opera: short_name or name is required for a web app to be installable.Opera Android: short_name or name is required for a web app to be installable.Samsung Internet: short_name or name is required for a web app to be installable.WebView Android: short_name or name is required for a web app to be installable. |
| html.manifest.shortcuts 📋 | Safari | 3/5/2024 | 964 | Chrome: Supported on Windows only.Edge: Supported on Windows only.Opera: Supported on Windows only. |
| html.manifest.start_url 📋 | Safari | 9/18/2023 | 1133 | Chrome: start_url is required for a web app to be installable.Chrome Android: start_url is required for a web app to be installable.Edge: start_url is required for a web app to be installable.Quest Browser: start_url is required for a web app to be installable.Opera: start_url is required for a web app to be installable.Opera Android: start_url is required for a web app to be installable.Samsung Internet: start_url is required for a web app to be installable.WebView Android: start_url is required for a web app to be installable. |
| html.manifest.theme_color 📋 | Safari | 9/18/2023 | 1133 |