For a given set of browsers, what APIs are not yet in all of them.
| Not in Firefox | Not in Safari on iOS | |
|---|---|---|
| In Firefox | 242 | |
| In Safari on iOS | 269 |
Below is a list of features that are not in all of Firefox and Safari on iOS
| API | First Browser | Date | Days in Limbo | Notes |
|---|---|---|---|---|
| css.at-rules.container.style_queries_for_custom_properties 📋 | Safari on iOS | 9/16/2024 | 757 | Safari: The document element cannot be a container. See bug 271040.Safari on iOS: The document element cannot be a container. See bug 271040.WebView on iOS: The document element cannot be a container. See bug 271040. |
| css.at-rules.counter-style.speak-as 📋 | Firefox | 10/14/2014 | 4382 | |
| css.at-rules.document | Firefox | 6/26/2018 | 3031 | Firefox: Only supports an empty url-prefix() value, which is supported due to its use in Firefox browser detection. Still supported in user stylesheets.Firefox for Android: Only supports an empty url-prefix() value, which is supported due to its use in Firefox for Android browser detection. Still supported in user stylesheets. |
| css.at-rules.font-face.OpenType_COLRv1 | Firefox | 11/15/2022 | 1428 | |
| css.at-rules.font-face.OpenType_SBIX | Safari on iOS | 3/21/2016 | 3858 | |
| css.at-rules.font-face.SVG_fonts | Safari on iOS | 6/17/2009 | 6327 | |
| css.at-rules.font-face.ascent-override 📋 | Firefox | 6/1/2021 | 1960 | |
| css.at-rules.font-face.descent-override 📋 | Firefox | 6/1/2021 | 1960 | |
| css.at-rules.font-face.font-variation-settings 📋 | Firefox | 9/5/2018 | 2960 | |
| css.at-rules.font-face.line-gap-override 📋 | Firefox | 6/1/2021 | 1960 | |
| css.at-rules.font-face.src.drop_invalid_item | Firefox | 1/17/2023 | 1365 | Chrome: Chrome drops invalid item for tech() but not other invalid valuesChrome Android: Chrome Android drops invalid item for tech() but not other invalid valuesEdge: Edge drops invalid item for tech() but not other invalid valuesOpera: Opera drops invalid item for tech() but not other invalid valuesOpera Android: Opera Android drops invalid item for tech() but not other invalid valuesSamsung Internet: Samsung Internet drops invalid item for tech() but not other invalid valuesWebView Android: WebView Android drops invalid item for tech() but not other invalid values |
| css.at-rules.font-face.src.format_keyword | Safari on iOS | 10/12/2011 | 5480 | |
| css.at-rules.import.supports 📋 | Firefox | 7/4/2023 | 1197 | |
| css.at-rules.media.-moz-device-pixel-ratio | Firefox | 3/22/2011 | 5684 | |
| css.at-rules.media.-webkit-animation | Safari on iOS | 4/3/2010 | 6037 | |
| css.at-rules.media.-webkit-transform-2d | Safari on iOS | 4/3/2010 | 6037 | |
| css.at-rules.media.-webkit-transition | Safari on iOS | 4/3/2010 | 6037 | |
| css.at-rules.media.color-index 📋 | Safari on iOS | 9/17/2014 | 4409 | |
| css.at-rules.media.media_query_values | Firefox | 3/13/2018 | 3136 | |
| css.at-rules.media.prefers-color-scheme.respects-inherited-scheme | Firefox | 9/20/2022 | 1484 | Chrome: Only supports SVG images, not iframes.Chrome Android: Only supports SVG images, not iframes.Edge: Only supports SVG images, not iframes.Opera: Only supports SVG images, not iframes.Opera Android: Only supports SVG images, not iframes.Samsung Internet: Only supports SVG images, not iframes.WebView Android: Only supports SVG images, not iframes. |
| css.at-rules.media.prefers-reduced-transparency 📋 | Firefox | 5/9/2023 | 1253 | |
| css.at-rules.media.video-dynamic-range 📋 | Firefox | 5/3/2022 | 1624 | |
| css.at-rules.page.page-orientation 📋 | Firefox | 1/23/2024 | 994 | |
| css.at-rules.view-transition 📋 | Safari on iOS | 12/11/2024 | 671 | |
| css.properties.-moz-float-edge | Firefox | 11/9/2004 | 8008 | |
| css.properties.-moz-force-broken-image-icon | Firefox | 11/9/2004 | 8008 | |
| css.properties.-moz-orient | Firefox | 8/16/2011 | 5537 | |
| css.properties.-moz-orient.block | Firefox | 8/11/2015 | 4081 | |
| css.properties.-moz-orient.inline | Firefox | 8/11/2015 | 4081 | |
| css.properties.-webkit-border-before | Safari on iOS | 10/12/2011 | 5480 | |
| css.properties.-webkit-border-horizontal-spacing | Safari on iOS | 4/3/2010 | 6037 | |
| css.properties.-webkit-border-vertical-spacing | Safari on iOS | 4/3/2010 | 6037 | |
| css.properties.-webkit-box-reflect | Safari on iOS | 4/3/2010 | 6037 | |
| css.properties.-webkit-column-axis | Safari on iOS | 9/10/2012 | 5146 | |
| css.properties.-webkit-column-break-after | Safari on iOS | 4/3/2010 | 6037 | |
| css.properties.-webkit-column-break-before | Safari on iOS | 4/3/2010 | 6037 | |
| css.properties.-webkit-column-break-inside | Safari on iOS | 4/3/2010 | 6037 | |
| css.properties.-webkit-column-progression | Safari on iOS | 9/18/2013 | 4773 | |
| css.properties.-webkit-cursor-visibility | Safari on iOS | 9/18/2013 | 4773 | |
| css.properties.-webkit-hyphenate-limit-after | Safari on iOS | 10/12/2011 | 5480 | |
| css.properties.-webkit-hyphenate-limit-before | Safari on iOS | 10/12/2011 | 5480 | |
| css.properties.-webkit-hyphenate-limit-lines | Safari on iOS | 9/10/2012 | 5146 | |
| css.properties.-webkit-line-align | Safari on iOS | 9/10/2012 | 5146 | |
| css.properties.-webkit-line-box-contain | Safari on iOS | 10/12/2011 | 5480 | |
| css.properties.-webkit-line-grid | Safari on iOS | 9/10/2012 | 5146 | |
| css.properties.-webkit-line-snap | Safari on iOS | 9/10/2012 | 5146 | |
| css.properties.-webkit-locale | Safari on iOS | 10/12/2011 | 5480 | |
| css.properties.-webkit-logical-height | Safari on iOS | 10/12/2011 | 5480 | |
| css.properties.-webkit-logical-width | Safari on iOS | 10/12/2011 | 5480 | |
| css.properties.-webkit-margin-after | Safari on iOS | 10/12/2011 | 5480 | |
| css.properties.-webkit-margin-before | Safari on iOS | 10/12/2011 | 5480 | |
| css.properties.-webkit-mask-box-image | Safari on iOS | 7/11/2008 | 6668 | |
| css.properties.-webkit-mask-composite | Safari on iOS | 7/11/2008 | 6668 | |
| css.properties.-webkit-mask-source-type | Safari on iOS | 9/18/2013 | 4773 | |
| css.properties.-webkit-max-logical-height | Safari on iOS | 10/12/2011 | 5480 | |
| css.properties.-webkit-max-logical-width | Safari on iOS | 10/12/2011 | 5480 | |
| css.properties.-webkit-min-logical-height | Safari on iOS | 10/12/2011 | 5480 | |
| css.properties.-webkit-min-logical-width | Safari on iOS | 10/12/2011 | 5480 | |
| css.properties.-webkit-nbsp-mode | Safari on iOS | 4/3/2010 | 6037 | |
| css.properties.-webkit-perspective-origin-x | Safari on iOS | 4/3/2010 | 6037 | |
| css.properties.-webkit-perspective-origin-y | Safari on iOS | 4/3/2010 | 6037 | |
| css.properties.-webkit-rtl-ordering | Safari on iOS | 4/3/2010 | 6037 | |
| css.properties.-webkit-tap-highlight-color | Safari on iOS | 6/21/2010 | 5958 | |
| css.properties.-webkit-text-combine | Safari on iOS | 10/12/2011 | 5480 | |
| css.properties.-webkit-text-zoom | Safari on iOS | 9/13/2016 | 3682 | |
| css.properties.-webkit-touch-callout | Safari on iOS | 7/11/2008 | 6668 | |
| css.properties.-webkit-transform-origin-x | Safari on iOS | 4/3/2010 | 6037 | |
| css.properties.-webkit-transform-origin-y | Safari on iOS | 4/3/2010 | 6037 | |
| css.properties.-webkit-transform-origin-z | Safari on iOS | 4/3/2010 | 6037 | |
| css.properties.-webkit-user-drag | Safari on iOS | 4/3/2010 | 6037 | |
| css.properties.align-content.multicol_context 📋 | Safari on iOS | 3/5/2024 | 952 | |
| css.properties.align-self.position_absolute_context 📋 | Firefox | 1/7/2025 | 644 | |
| css.properties.alignment-baseline 📋 | Safari on iOS | 10/12/2011 | 5480 | |
| css.properties.alignment-baseline.alphabetic | Safari on iOS | 3/24/2020 | 2394 | |
| css.properties.alignment-baseline.baseline | Safari on iOS | 10/12/2011 | 5480 | |
| css.properties.alignment-baseline.central | Safari on iOS | 10/12/2011 | 5480 | |
| css.properties.alignment-baseline.ideographic | Safari on iOS | 10/12/2011 | 5480 | |
| css.properties.alignment-baseline.mathematical | Safari on iOS | 10/12/2011 | 5480 | |
| css.properties.alignment-baseline.middle | Safari on iOS | 10/12/2011 | 5480 | |
| css.properties.animation-timeline 📋 | Firefox | 2/14/2023 | 1337 | |
| css.properties.animation-timeline.scroll 📋 | Firefox | 2/14/2023 | 1337 | Firefox: Zero scroll range is treated as 100% but should be 0% (see bug 1780865).Firefox: Supports the deprecated horizontal and vertical axis values, and not the x and y values. |
| css.properties.animation-timeline.view 📋 | Firefox | 6/6/2023 | 1225 | |
| css.properties.background-clip.border-area 📋 | Safari on iOS | 12/11/2024 | 671 | |
| css.properties.background-image.element 📋 | Firefox | 3/22/2011 | 5684 | |
| css.properties.baseline-shift 📋 | Safari on iOS | 3/24/2020 | 2394 | |
| css.properties.baseline-shift.baseline 📋 | Safari on iOS | 3/24/2020 | 2394 | |
| css.properties.baseline-shift.sub 📋 | Safari on iOS | 3/24/2020 | 2394 | |
| css.properties.baseline-shift.super 📋 | Safari on iOS | 3/24/2020 | 2394 | |
| css.properties.baseline-source 📋 | Firefox | 7/4/2023 | 1197 | |
| css.properties.baseline-source.auto 📋 | Firefox | 7/4/2023 | 1197 | |
| css.properties.baseline-source.first 📋 | Firefox | 7/4/2023 | 1197 | |
| css.properties.baseline-source.last 📋 | Firefox | 7/4/2023 | 1197 | |
| css.properties.block-size.fit-content_function | Firefox | 8/10/2021 | 1890 | |
| css.properties.box-flex-group | Safari on iOS | 6/29/2007 | 7046 | |
| css.properties.box-lines | Safari on iOS | 6/29/2007 | 7046 | |
| css.properties.break-after.always | Firefox | 1/7/2020 | 2471 | |
| css.properties.break-after.avoid-column | Safari on iOS | 3/24/2020 | 2394 | |
| css.properties.break-after.avoid-page | Safari on iOS | 3/24/2020 | 2394 | |
| css.properties.break-after.column | Safari on iOS | 3/24/2020 | 2394 | |
| css.properties.break-after.multicol_context 📋 | Firefox | 1/29/2019 | 2814 | Firefox: Only supported in print mode. See bug 1675322.Firefox for Android: Only supported in print mode. See bug 1675322. |
| css.properties.break-after.multicol_context.always | Firefox | 1/29/2019 | 2814 | Firefox: Only supported in print mode. See bug 1675322.Firefox for Android: Only supported in print mode. See bug 1675322. |
| css.properties.break-after.paged_context.always | Firefox | 1/29/2019 | 2814 | |
| css.properties.break-after.paged_context.avoid-page | Safari on iOS | 9/13/2016 | 3682 | |
| css.properties.break-after.recto | Safari on iOS | 3/24/2020 | 2394 | |
| css.properties.break-after.verso | Safari on iOS | 3/24/2020 | 2394 | |
| css.properties.break-before.always | Firefox | 1/7/2020 | 2471 | |
| css.properties.break-before.avoid-column | Safari on iOS | 3/24/2020 | 2394 | |
| css.properties.break-before.avoid-page | Safari on iOS | 3/24/2020 | 2394 | |
| css.properties.break-before.column | Safari on iOS | 3/24/2020 | 2394 | |
| css.properties.break-before.multicol_context 📋 | Firefox | 1/29/2019 | 2814 | Firefox: Only supported in print mode. See bug 1675322.Firefox for Android: Only supported in print mode. See bug 1675322. |
| css.properties.break-before.multicol_context.always | Firefox | 1/29/2019 | 2814 | Firefox: Only supported in print mode. See bug 1675322.Firefox for Android: Only supported in print mode. See bug 1675322. |
| css.properties.break-before.paged_context.always | Firefox | 1/29/2019 | 2814 | |
| css.properties.break-before.recto | Safari on iOS | 3/24/2020 | 2394 | |
| css.properties.break-before.verso | Safari on iOS | 3/24/2020 | 2394 | |
| css.properties.break-inside.paged_context.avoid-page | Firefox | 9/7/2021 | 1862 | |
| css.properties.caption-side.writing-mode_relative_values | Firefox | 11/3/2015 | 3997 | |
| css.properties.clip-path.is_animatable | Firefox | 9/20/2016 | 3675 | |
| css.properties.color-interpolation.linearGradient | Firefox | 2/20/2024 | 966 | |
| css.properties.content.none_applies_to_elements | Firefox | 8/10/2021 | 1890 | |
| css.properties.content-visibility.is_transitionable 📋 | Safari on iOS | 9/16/2024 | 757 | |
| css.properties.content-visibility.keyframe_animatable 📋 | Safari on iOS | 9/16/2024 | 757 | |
| css.properties.counter-reset.reset_does_not_affect_siblings | Firefox | 10/20/2020 | 2184 | |
| css.properties.counter-reset.reversed 📋 | Firefox | 1/11/2022 | 1736 | |
| css.properties.cursor.alias 📋 | Firefox | 11/29/2005 | 7623 | Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.cursor.all-scroll 📋 | Firefox | 11/29/2005 | 7623 | Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.cursor.col-resize 📋 | Firefox | 11/29/2005 | 7623 | Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.cursor.context-menu 📋 | Firefox | 11/29/2005 | 7623 | Chrome: This cursor is only supported on macOS and Linux.Chrome Android: This cursor is only supported on macOS and Linux.Firefox: This cursor is only supported on macOS and Linux.Quest Browser: This cursor is only supported on macOS and Linux.Opera Android: This cursor is only supported on macOS and Linux.Safari on iOS: If this value is used, the iPad will display the default pointer instead.Samsung Internet: This cursor is only supported on macOS and Linux.WebView Android: This cursor is only supported on macOS and Linux.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.cursor.copy 📋 | Firefox | 11/29/2005 | 7623 | Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.cursor.crosshair 📋 | Firefox | 11/9/2004 | 8008 | Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.cursor.default 📋 | Firefox | 11/9/2004 | 8008 | Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.cursor.e-resize 📋 | Firefox | 11/9/2004 | 8008 | Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.cursor.ew-resize 📋 | Firefox | 11/29/2005 | 7623 | Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.cursor.grab | Firefox | 2/4/2014 | 4634 | Chrome: Chrome also continues to support the prefixed versions.Chrome: Chrome 22 added Windows support.Chrome Android: Chrome Android also continues to support the prefixed versions.Chrome Android: Chrome Android 25 added Windows support.Quest Browser: Quest Browser also continues to support the prefixed versions.Quest Browser: Quest Browser 5.0 added Windows support.Opera: Opera also continues to support the prefixed versions.Opera: Opera 22 added Windows support.Opera Android: Opera also continues to support the prefixed versions.Opera Android: Opera 22 added Windows support.Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView Android: WebView Android also continues to support the prefixed versions.WebView Android: WebView Android 4.4 added Windows support.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.cursor.grabbing 📋 | Firefox | 2/4/2014 | 4634 | Chrome: Chrome 22 added Windows support.Chrome Android: Chrome Android 25 added Windows support.Edge: Edge 79 added Windows support.Quest Browser: Quest Browser 5.0 added Windows support.Opera: Opera 15 added Windows support.Opera Android: Opera Android 14 added Windows support.Safari on iOS: If this value is used, the iPad will display the default pointer instead.Samsung Internet: Samsung Internet 1.5 added Windows support.WebView Android: WebView Android 4.4 added Windows support.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.cursor.help 📋 | Firefox | 11/9/2004 | 8008 | Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.cursor.move 📋 | Firefox | 11/9/2004 | 8008 | Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.cursor.n-resize 📋 | Firefox | 11/9/2004 | 8008 | Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.cursor.ne-resize 📋 | Firefox | 11/9/2004 | 8008 | Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.cursor.nesw-resize 📋 | Firefox | 11/29/2005 | 7623 | Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.cursor.no-drop 📋 | Firefox | 11/29/2005 | 7623 | Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.cursor.none 📋 | Firefox | 6/17/2008 | 6692 | Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.cursor.not-allowed 📋 | Firefox | 11/29/2005 | 7623 | Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.cursor.ns-resize 📋 | Firefox | 11/29/2005 | 7623 | Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.cursor.nw-resize 📋 | Firefox | 11/9/2004 | 8008 | Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.cursor.nwse-resize 📋 | Firefox | 11/29/2005 | 7623 | Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.cursor.pointer 📋 | Firefox | 11/9/2004 | 8008 | Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.cursor.progress 📋 | Firefox | 11/9/2004 | 8008 | Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.cursor.row-resize 📋 | Firefox | 11/29/2005 | 7623 | Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.cursor.s-resize 📋 | Firefox | 11/9/2004 | 8008 | Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.cursor.se-resize 📋 | Firefox | 11/9/2004 | 8008 | Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.cursor.sw-resize 📋 | Firefox | 11/9/2004 | 8008 | Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.cursor.url_positioning_syntax | Firefox | 11/29/2005 | 7623 | Firefox: Firefox 4 added macOS support.Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.cursor.vertical-text 📋 | Firefox | 11/29/2005 | 7623 | Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.cursor.w-resize 📋 | Firefox | 11/9/2004 | 8008 | Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.cursor.wait 📋 | Firefox | 11/9/2004 | 8008 | Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.cursor.zoom-in 📋 | Firefox | 9/17/2013 | 4774 | Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.cursor.zoom-out 📋 | Firefox | 9/17/2013 | 4774 | Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead. |
| css.properties.d 📋 | Firefox | 2/8/2022 | 1708 | Safari: The property parses, but has no effect.Safari on iOS: The property parses, but has no effect.WebView on iOS: The property parses, but has no effect. |
| css.properties.display.contents.contents_unusual | Firefox | 3/13/2018 | 3136 | |
| css.properties.display.is_transitionable 📋 | Safari on iOS | 9/16/2024 | 757 | |
| css.properties.display.keyframe_animatable 📋 | Safari on iOS | 9/16/2024 | 757 | |
| css.properties.display.list-item.legend-support | Firefox | 12/11/2018 | 2863 | |
| css.properties.display.none.option_is_hidden | Firefox | 11/9/2004 | 8008 | |
| css.properties.display.ruby | Firefox | 5/12/2015 | 4172 | |
| css.properties.display.ruby-base | Firefox | 5/12/2015 | 4172 | |
| css.properties.display.ruby-base-container | Firefox | 5/12/2015 | 4172 | |
| css.properties.display.ruby-text | Firefox | 5/12/2015 | 4172 | |
| css.properties.display.ruby-text-container | Firefox | 5/12/2015 | 4172 | |
| css.properties.filter.svg_elements | Firefox | 1/13/2015 | 4291 | |
| css.properties.flex-grow.less_than_zero_animate | Firefox | 9/2/2014 | 4424 | Firefox: Before Firefox 32, Firefox wasn't able to animate values starting or stopping at 0.Firefox for Android: Before Firefox for Android 32, Firefox for Android wasn't able to animate values starting or stopping at 0. |
| css.properties.font-family.ui-monospace | Safari on iOS | 3/24/2020 | 2394 | |
| css.properties.font-family.ui-rounded | Safari on iOS | 3/24/2020 | 2394 | |
| css.properties.font-family.ui-sans-serif | Safari on iOS | 3/24/2020 | 2394 | |
| css.properties.font-family.ui-serif | Safari on iOS | 3/24/2020 | 2394 | |
| css.properties.font-language-override 📋 | Firefox | 12/1/2014 | 4334 | |
| css.properties.font-size.math | Firefox | 8/29/2023 | 1141 | |
| css.properties.font-synthesis.position | Firefox | 9/26/2023 | 1113 | |
| css.properties.font-synthesis-position 📋 | Firefox | 9/26/2023 | 1113 | |
| css.properties.font-synthesis-position.auto 📋 | Firefox | 9/26/2023 | 1113 | |
| css.properties.font-synthesis-position.none 📋 | Firefox | 9/26/2023 | 1113 | |
| css.properties.forced-color-adjust 📋 | Firefox | 5/9/2023 | 1253 | |
| css.properties.forced-color-adjust.auto 📋 | Firefox | 5/9/2023 | 1253 | |
| css.properties.forced-color-adjust.none 📋 | Firefox | 5/9/2023 | 1253 | |
| css.properties.glyph-orientation-vertical 📋 | Safari on iOS | 3/24/2020 | 2394 | |
| css.properties.grid-template-columns.masonry 📋 | Firefox | 6/2/2020 | 2324 | |
| css.properties.grid-template-rows.masonry 📋 | Firefox | 6/2/2020 | 2324 | |
| css.properties.hanging-punctuation 📋 | Safari on iOS | 9/13/2016 | 3682 | Safari: The characters U+0027 and U+0022 are not supported by the first and last keywords.Safari on iOS: The characters U+0027 and U+0022 are not supported by the first and last keywords.WebView on iOS: The characters U+0027 and U+0022 are not supported by the first and last keywords. |
| css.properties.hanging-punctuation.allow-end 📋 | Safari on iOS | 3/24/2020 | 2394 | |
| css.properties.hanging-punctuation.first 📋 | Safari on iOS | 3/24/2020 | 2394 | |
| css.properties.hanging-punctuation.last 📋 | Safari on iOS | 3/24/2020 | 2394 | |
| css.properties.hanging-punctuation.none 📋 | Safari on iOS | 3/24/2020 | 2394 | |
| css.properties.height.fit-content_function 📋 | Firefox | 8/10/2021 | 1890 | |
| css.properties.height.stretch 📋 | Safari on iOS | 9/16/2015 | 4045 | |
| css.properties.hyphens.language_afrikaans | Firefox | 11/8/2011 | 5453 | |
| css.properties.hyphens.language_bosnian | Firefox | 11/8/2011 | 5453 | |
| css.properties.hyphens.language_bulgarian | Firefox | 11/8/2011 | 5453 | |
| css.properties.hyphens.language_esperanto | Firefox | 11/8/2011 | 5453 | |
| css.properties.hyphens.language_estonian | Firefox | 11/8/2011 | 5453 | |
| css.properties.hyphens.language_galician | Firefox | 12/20/2011 | 5411 | |
| css.properties.hyphens.language_german_swiss_orthography | Firefox | 11/8/2011 | 5453 | |
| css.properties.hyphens.language_german_traditional_orthography | Firefox | 11/8/2011 | 5453 | |
| css.properties.hyphens.language_icelandic | Firefox | 11/8/2011 | 5453 | |
| css.properties.hyphens.language_interlingua | Firefox | 11/8/2011 | 5453 | |
| css.properties.hyphens.language_kurmanji | Firefox | 11/8/2011 | 5453 | |
| css.properties.hyphens.language_latin | Firefox | 11/8/2011 | 5453 | |
| css.properties.hyphens.language_lithuanian | Firefox | 11/8/2011 | 5453 | |
| css.properties.hyphens.language_mongolian | Firefox | 11/8/2011 | 5453 | |
| css.properties.hyphens.language_slovak | Firefox | 9/3/2024 | 770 | |
| css.properties.hyphens.language_slovenian | Firefox | 11/8/2011 | 5453 | |
| css.properties.hyphens.language_upper_sorbian | Firefox | 11/8/2011 | 5453 | |
| css.properties.hyphens.language_welsh | Firefox | 11/8/2011 | 5453 | |
| css.properties.image-rendering.smooth 📋 | Firefox | 10/5/2021 | 1834 | |
| css.properties.ime-mode 📋 | Firefox | 6/17/2008 | 6692 | |
| css.properties.initial-letter 📋 | Safari on iOS | 9/16/2015 | 4045 | Safari: See bug 229090 for the unprefixed property.Safari on iOS: See bug 229090 for the unprefixed property.WebView on iOS: See bug 229090 for the unprefixed property. |
| css.properties.initial-letter.normal 📋 | Safari on iOS | 9/16/2015 | 4045 | |
| css.properties.inline-size.fit-content_function | Firefox | 8/10/2021 | 1890 | |
| css.properties.justify-self.position_absolute_context 📋 | Firefox | 1/7/2025 | 644 | |
| css.properties.list-style.symbols 📋 | Firefox | 1/13/2015 | 4291 | |
| css.properties.list-style-type.afar | Safari on iOS | 11/22/2010 | 5804 | |
| css.properties.list-style-type.amharic | Safari on iOS | 11/22/2010 | 5804 | |
| css.properties.list-style-type.amharic-abegede | Safari on iOS | 11/22/2010 | 5804 | |
| css.properties.list-style-type.asterisks | Safari on iOS | 10/12/2011 | 5480 | |
| css.properties.list-style-type.binary | Safari on iOS | 11/22/2010 | 5804 | |
| css.properties.list-style-type.ethiopic | Safari on iOS | 11/22/2010 | 5804 | |
| css.properties.list-style-type.ethiopic-abegede | Safari on iOS | 11/22/2010 | 5804 | |
| css.properties.list-style-type.ethiopic-abegede-am-et | Safari on iOS | 11/22/2010 | 5804 | |
| css.properties.list-style-type.ethiopic-abegede-gez | Safari on iOS | 11/22/2010 | 5804 | |
| css.properties.list-style-type.ethiopic-abegede-ti-er | Safari on iOS | 11/22/2010 | 5804 | |
| css.properties.list-style-type.ethiopic-abegede-ti-et | Safari on iOS | 11/22/2010 | 5804 | |
| css.properties.list-style-type.ethiopic-halehame-aa-er | Safari on iOS | 11/22/2010 | 5804 | |
| css.properties.list-style-type.ethiopic-halehame-aa-et | Safari on iOS | 11/22/2010 | 5804 | |
| css.properties.list-style-type.ethiopic-halehame-am-et | Safari on iOS | 11/22/2010 | 5804 | |
| css.properties.list-style-type.ethiopic-halehame-gez | Safari on iOS | 11/22/2010 | 5804 | |
| css.properties.list-style-type.ethiopic-halehame-om-et | Safari on iOS | 11/22/2010 | 5804 | |
| css.properties.list-style-type.ethiopic-halehame-sid-et | Safari on iOS | 11/22/2010 | 5804 | |
| css.properties.list-style-type.ethiopic-halehame-so-et | Safari on iOS | 11/22/2010 | 5804 | |
| css.properties.list-style-type.ethiopic-halehame-tig | Safari on iOS | 11/22/2010 | 5804 | |
| css.properties.list-style-type.footnotes | Safari on iOS | 10/12/2011 | 5480 | |
| css.properties.list-style-type.lower-hexadecimal | Safari on iOS | 11/22/2010 | 5804 | |
| css.properties.list-style-type.lower-norwegian | Safari on iOS | 11/22/2010 | 5804 | |
| css.properties.list-style-type.octal | Safari on iOS | 11/22/2010 | 5804 | |
| css.properties.list-style-type.oromo | Safari on iOS | 11/22/2010 | 5804 | |
| css.properties.list-style-type.sidama | Safari on iOS | 11/22/2010 | 5804 | |
| css.properties.list-style-type.somali | Safari on iOS | 11/22/2010 | 5804 | |
| css.properties.list-style-type.symbols 📋 | Firefox | 1/13/2015 | 4291 | |
| css.properties.list-style-type.tigre | Safari on iOS | 11/22/2010 | 5804 | |
| css.properties.list-style-type.tigrinya-er | Safari on iOS | 11/22/2010 | 5804 | |
| css.properties.list-style-type.tigrinya-er-abegede | Safari on iOS | 11/22/2010 | 5804 | |
| css.properties.list-style-type.tigrinya-et | Safari on iOS | 11/22/2010 | 5804 | |
| css.properties.list-style-type.tigrinya-et-abegede | Safari on iOS | 11/22/2010 | 5804 | |
| css.properties.list-style-type.upper-greek | Safari on iOS | 6/29/2007 | 7046 | |
| css.properties.list-style-type.upper-hexadecimal | Safari on iOS | 11/22/2010 | 5804 | |
| css.properties.list-style-type.upper-norwegian | Safari on iOS | 11/22/2010 | 5804 | |
| css.properties.margin-trim 📋 | Safari on iOS | 3/27/2023 | 1296 | |
| css.properties.margin-trim.block 📋 | Safari on iOS | 3/27/2023 | 1296 | |
| css.properties.margin-trim.block-end 📋 | Safari on iOS | 3/27/2023 | 1296 | |
| css.properties.margin-trim.block-start 📋 | Safari on iOS | 3/27/2023 | 1296 | |
| css.properties.margin-trim.inline 📋 | Safari on iOS | 3/27/2023 | 1296 | |
| css.properties.margin-trim.inline-end 📋 | Safari on iOS | 3/27/2023 | 1296 | |
| css.properties.margin-trim.inline-start 📋 | Safari on iOS | 3/27/2023 | 1296 | |
| css.properties.margin-trim.none 📋 | Safari on iOS | 3/27/2023 | 1296 | |
| css.properties.mask-border 📋 | Safari on iOS | 6/17/2009 | 6327 | |
| css.properties.mask-border-outset 📋 | Safari on iOS | 6/17/2009 | 6327 | |
| css.properties.mask-border-repeat 📋 | Safari on iOS | 6/17/2009 | 6327 | |
| css.properties.mask-border-slice 📋 | Safari on iOS | 6/17/2009 | 6327 | |
| css.properties.mask-border-source 📋 | Safari on iOS | 6/17/2009 | 6327 | |
| css.properties.mask-border-width 📋 | Safari on iOS | 6/17/2009 | 6327 | |
| css.properties.mask-clip.border | Safari on iOS | 4/3/2010 | 6037 | |
| css.properties.mask-clip.content | Safari on iOS | 4/3/2010 | 6037 | |
| css.properties.mask-clip.padding | Safari on iOS | 4/3/2010 | 6037 | |
| css.properties.mask-clip.text | Safari on iOS | 4/3/2010 | 6037 | |
| css.properties.mask-origin.border | Safari on iOS | 3/14/2022 | 1674 | |
| css.properties.mask-origin.content | Safari on iOS | 3/14/2022 | 1674 | |
| css.properties.mask-origin.fill-box | Firefox | 4/19/2017 | 3464 | |
| css.properties.mask-origin.padding | Safari on iOS | 3/14/2022 | 1674 | |
| css.properties.mask-origin.stroke-box | Firefox | 4/19/2017 | 3464 | |
| css.properties.mask-origin.view-box | Firefox | 4/19/2017 | 3464 | |
| css.properties.math-depth 📋 | Firefox | 8/29/2023 | 1141 | |
| css.properties.max-block-size.fit-content_function | Firefox | 8/10/2021 | 1890 | |
| css.properties.max-height.fit-content_function 📋 | Firefox | 8/10/2021 | 1890 | |
| css.properties.max-inline-size.fit-content_function | Firefox | 8/10/2021 | 1890 | |
| css.properties.max-width.fit-content_function 📋 | Firefox | 8/10/2021 | 1890 | |
| css.properties.min-block-size.fit-content_function | Firefox | 8/10/2021 | 1890 | |
| css.properties.min-height.fit-content_function 📋 | Firefox | 8/10/2021 | 1890 | |
| css.properties.min-height.stretch | Safari on iOS | 9/16/2015 | 4045 | |
| css.properties.min-inline-size.fit-content_function | Firefox | 8/10/2021 | 1890 | |
| css.properties.min-width.fit-content_function 📋 | Firefox | 8/10/2021 | 1890 | |
| css.properties.mix-blend-mode.plus-darker 📋 | Safari on iOS | 3/24/2020 | 2394 | |
| css.properties.mix-blend-mode.svg_elements | Firefox | 9/2/2014 | 4424 | |
| css.properties.offset-path.margin-box 📋 | Safari on iOS | 9/16/2024 | 757 | |
| css.properties.orphans 📋 | Safari on iOS | 6/29/2007 | 7046 | |
| css.properties.overflow-anchor 📋 | Firefox | 3/19/2019 | 2765 | |
| css.properties.overflow-anchor.auto 📋 | Firefox | 3/19/2019 | 2765 | |
| css.properties.overflow-anchor.none 📋 | Firefox | 3/19/2019 | 2765 | |
| css.properties.overflow-block 📋 | Firefox | 9/3/2019 | 2597 | |
| css.properties.overflow-block.overlay | Firefox | 4/11/2023 | 1281 | |
| css.properties.overflow-clip-margin 📋 | Firefox | 6/28/2022 | 1568 | Chrome: Only works when both axes are using overflow: clip. See bug 40235584.Chrome Android: Only works when both axes are using overflow: clip. See bug 40235584.Edge: Only works when both axes are using overflow: clip. See bug 40235584.Firefox: Only supports using a length, not a visual box. See bug 1661582.Firefox for Android: Only supports using a length, not a visual box. See bug 1661582.Quest Browser: Only works when both axes are using overflow: clip. See bug 40235584.Opera: Only works when both axes are using overflow: clip. See bug 40235584.Opera Android: Only works when both axes are using overflow: clip. See bug 40235584.Samsung Internet: Only works when both axes are using overflow: clip. See bug 40235584.WebView Android: Only works when both axes are using overflow: clip. See bug 40235584. |
| css.properties.overflow-inline 📋 | Firefox | 9/3/2019 | 2597 | |
| css.properties.overflow-inline.overlay | Firefox | 4/11/2023 | 1281 | |
| css.properties.place-self.position_absolute_context 📋 | Firefox | 1/7/2025 | 644 | |
| css.properties.resize 📋 | Firefox | 3/22/2011 | 5684 | Safari on iOS: The value is recognized, but has no effect.WebView on iOS: The value is recognized, but has no effect. |
| css.properties.resize.block | Firefox | 10/23/2018 | 2912 | |
| css.properties.resize.block_level_support | Firefox | 6/21/2011 | 5593 | Firefox: resize doesn't have any effect on <iframe>. See bug 680823)Firefox for Android: resize doesn't have any effect on <iframe>. See bug 680823) |
| css.properties.resize.inline | Firefox | 10/23/2018 | 2912 | |
| css.properties.ruby-overhang 📋 | Safari on iOS | 12/11/2024 | 671 | |
| css.properties.ruby-overhang.auto 📋 | Safari on iOS | 12/11/2024 | 671 | |
| css.properties.ruby-overhang.none 📋 | Safari on iOS | 12/11/2024 | 671 | |
| css.properties.ruby-position.alternate | Firefox | 4/19/2021 | 2003 | |
| css.properties.ruby-position.inter-character | Safari on iOS | 12/11/2024 | 671 | Chrome: This value is only supported with the prefixed version of the property.Chrome Android: This value is only supported with the prefixed version of the property.Edge: This value is only supported with the prefixed version of the property.Quest Browser: This value is only supported with the prefixed version of the property.Opera: This value is only supported with the prefixed version of the property.Opera Android: This value is only supported with the prefixed version of the property.Samsung Internet: This value is only supported with the prefixed version of the property.WebView Android: This value is only supported with the prefixed version of the property. |
| css.properties.rx 📋 | Firefox | 1/7/2020 | 2471 | Safari: The value is recognized, but has no effect. This property is only recognized as an attribute applied to the SVG element. See bug 266090.Safari on iOS: The value is recognized, but has no effect. This property is only recognized as an attribute applied to the SVG element. See bug 266090.WebView on iOS: The value is recognized, but has no effect. This property is only recognized as an attribute applied to the SVG element. See bug 266090. |
| css.properties.ry 📋 | Firefox | 1/7/2020 | 2471 | Safari: The value is recognized, but has no effect. This property is only recognized as an attribute applied to the SVG element. See bug 266090.Safari on iOS: The value is recognized, but has no effect. This property is only recognized as an attribute applied to the SVG element. See bug 266090.WebView on iOS: The value is recognized, but has no effect. This property is only recognized as an attribute applied to the SVG element. See bug 266090. |
| css.properties.scroll-timeline 📋 | Firefox | 3/14/2023 | 1309 | Firefox: The syntax of the shorthand property uses the fixed order of name and then the axis.Firefox: Supports the deprecated horizontal and vertical axis values, and not the x and y values.Firefox: The @scroll-timeline at-rule is replaced with the longhand properties scroll-timeline-name and scroll-timeline-axis and the shorthand property scroll-timeline. |
| css.properties.scroll-timeline-axis 📋 | Firefox | 3/14/2023 | 1309 | Firefox: The syntax of the shorthand property uses the fixed order of name and then the axis.Firefox: Supports the deprecated horizontal and vertical values, and not the x and y values.Firefox: The @scroll-timeline at-rule is replaced with the longhand properties scroll-timeline-name and scroll-timeline-axis and the shorthand property scroll-timeline. |
| css.properties.scroll-timeline-name 📋 | Firefox | 3/14/2023 | 1309 | Firefox: The syntax of the shorthand property uses the fixed order of name and then the axis.Firefox: The @scroll-timeline at-rule is replaced with the longhand properties scroll-timeline-name and scroll-timeline-axis and the shorthand property scroll-timeline. |
| css.properties.scrollbar-color 📋 | Firefox | 12/11/2018 | 2863 | |
| css.properties.scrollbar-color.auto 📋 | Firefox | 12/11/2018 | 2863 | |
| css.properties.shape-image-threshold.percentages | Firefox | 10/22/2019 | 2548 | |
| css.properties.speak-as 📋 | Safari on iOS | 3/29/2018 | 3120 | |
| css.properties.speak-as.digits 📋 | Safari on iOS | 3/29/2018 | 3120 | |
| css.properties.speak-as.literal-punctuation 📋 | Safari on iOS | 3/29/2018 | 3120 | |
| css.properties.speak-as.no-punctuation 📋 | Safari on iOS | 3/29/2018 | 3120 | |
| css.properties.speak-as.normal 📋 | Safari on iOS | 3/29/2018 | 3120 | |
| css.properties.speak-as.spell-out 📋 | Safari on iOS | 3/29/2018 | 3120 | |
| css.properties.stroke-color 📋 | Safari on iOS | 3/24/2020 | 2394 | |
| css.properties.text-box 📋 | Safari on iOS | 12/11/2024 | 671 | |
| css.properties.text-box.normal 📋 | Safari on iOS | 12/11/2024 | 671 | |
| css.properties.text-box-edge 📋 | Safari on iOS | 12/11/2024 | 671 | |
| css.properties.text-box-edge.auto 📋 | Safari on iOS | 12/11/2024 | 671 | |
| css.properties.text-box-trim 📋 | Safari on iOS | 12/11/2024 | 671 | |
| css.properties.text-box-trim.none 📋 | Safari on iOS | 12/11/2024 | 671 | |
| css.properties.text-box-trim.trim-both 📋 | Safari on iOS | 12/11/2024 | 671 | |
| css.properties.text-box-trim.trim-end 📋 | Safari on iOS | 12/11/2024 | 671 | |
| css.properties.text-box-trim.trim-start 📋 | Safari on iOS | 12/11/2024 | 671 | |
| css.properties.text-decoration.includes_thickness | Firefox | 10/22/2019 | 2548 | |
| css.properties.text-decoration-skip 📋 | Safari on iOS | 3/25/2019 | 2759 | Chrome: Only supports the deprecated ink value.Chrome Android: Only supports the deprecated ink value.Opera: Only supports the deprecated ink value.Opera Android: Only supports the deprecated ink value.Safari: Supports only none, auto, and objects values.Safari: Supports only none, auto, and objects values.Safari on iOS: Supports only none, auto, and objects values.Safari on iOS: Supports only none, auto, and objects values.Samsung Internet: Only supports the deprecated ink value.WebView Android: Only supports the deprecated ink value.WebView on iOS: Supports only none, auto, and objects values.WebView on iOS: Supports only none, auto, and objects values. |
| css.properties.text-decoration-skip.auto 📋 | Safari on iOS | 3/24/2020 | 2394 | |
| css.properties.text-decoration-skip.none 📋 | Safari on iOS | 3/24/2020 | 2394 | |
| css.properties.text-emphasis-position.auto | Firefox | 10/29/2024 | 714 | |
| css.properties.text-justify 📋 | Firefox | 8/8/2017 | 3353 | Chrome: inter-word and distribute (deprecated) values are supported, but distribute behavior is buggy.Chrome Android: inter-word and distribute (deprecated) values are supported, but distribute behavior is buggy.Edge: inter-word and distribute (deprecated) values are supported, but distribute behavior is buggy.Edge: Standard values inter-character and none are supported. The deprecated distribute value is also supported.Internet Explorer: Standard values inter-character and none are supported. The deprecated distribute value is also supported.Quest Browser: inter-word and distribute (deprecated) values are supported, but distribute behavior is buggy.Opera: inter-word and distribute (deprecated) values are supported, but distribute behavior is buggy. |
| css.properties.text-justify.auto 📋 | Firefox | 8/8/2017 | 3353 | |
| css.properties.text-justify.inter-character 📋 | Firefox | 8/8/2017 | 3353 | |
| css.properties.text-justify.inter-word 📋 | Firefox | 8/8/2017 | 3353 | |
| css.properties.text-justify.none 📋 | Firefox | 8/8/2017 | 3353 | |
| css.properties.text-overflow.string | Firefox | 12/20/2011 | 5411 | |
| css.properties.text-overflow.two_value_syntax | Firefox | 12/20/2011 | 5411 | |
| css.properties.text-size-adjust 📋 | Safari on iOS | 6/29/2007 | 7046 | |
| css.properties.text-transform.dutch_ij_digraph | Firefox | 7/17/2012 | 5201 | |
| css.properties.text-transform.greek_accented_characters | Firefox | 8/28/2012 | 5159 | |
| css.properties.text-transform.math-auto 📋 | Firefox | 8/29/2023 | 1141 | |
| css.properties.user-modify | Safari on iOS | 10/12/2011 | 5480 | Firefox: While the CSS property is parsed and accepted, it does not have any effect.Firefox for Android: While the CSS property is parsed and accepted, it does not have any effect. |
| css.properties.user-modify.read-write-plaintext-only | Safari on iOS | 10/12/2011 | 5480 | |
| css.properties.view-timeline 📋 | Firefox | 6/6/2023 | 1225 | Firefox: Now supports the x and y values, and also the deprecated horizontal and vertical values. |
| css.properties.view-timeline-axis 📋 | Firefox | 6/6/2023 | 1225 | Firefox: Now supports the x and y values, and also the deprecated horizontal and vertical values. |
| css.properties.view-timeline-name 📋 | Firefox | 3/14/2023 | 1309 | |
| css.properties.view-transition-class 📋 | Safari on iOS | 12/11/2024 | 671 | |
| css.properties.view-transition-class.none 📋 | Safari on iOS | 12/11/2024 | 671 | |
| css.properties.view-transition-name 📋 | Safari on iOS | 9/16/2024 | 757 | |
| css.properties.view-transition-name.none 📋 | Safari on iOS | 9/16/2024 | 757 | |
| css.properties.white-space.svg_elements | Firefox | 2/24/2015 | 4249 | |
| css.properties.white-space-collapse.preserve-spaces 📋 | Firefox | 3/19/2024 | 938 | |
| css.properties.widows 📋 | Safari on iOS | 6/29/2007 | 7046 | |
| css.properties.width.fit-content_function 📋 | Firefox | 8/10/2021 | 1890 | |
| css.properties.writing-mode.sideways-lr | Firefox | 12/15/2015 | 3955 | |
| css.properties.writing-mode.sideways-rl | Firefox | 12/15/2015 | 3955 | |
| css.properties.zoom.reset | Safari on iOS | 6/17/2009 | 6327 | |
| css.selectors.-moz-color-swatch | Firefox | 2/4/2014 | 4634 | |
| css.selectors.-moz-first-node | Firefox | 1/7/2020 | 2471 | |
| css.selectors.-moz-focus-inner | Firefox | 1/7/2020 | 2471 | |
| css.selectors.-moz-last-node | Firefox | 1/7/2020 | 2471 | |
| css.selectors.-moz-list-bullet | Firefox | 1/7/2020 | 2471 | |
| css.selectors.-moz-list-number | Firefox | 1/7/2020 | 2471 | |
| css.selectors.-moz-only-whitespace | Firefox | 11/9/2004 | 8008 | |
| css.selectors.-moz-progress-bar | Firefox | 1/7/2020 | 2471 | |
| css.selectors.-moz-range-progress | Firefox | 6/25/2013 | 4858 | |
| css.selectors.-moz-range-thumb | Firefox | 5/14/2013 | 4900 | |
| css.selectors.-moz-range-track | Firefox | 5/14/2013 | 4900 | |
| css.selectors.-moz-submit-invalid | Firefox | 4/19/2021 | 2003 | Firefox: From Firefox 88 the feature has been placed behind a flag. See bug 1694129.Firefox for Android: From version 88, the feature has been withdrawn. See bug 1694129. |
| css.selectors.-moz-window-inactive | Firefox | 3/22/2011 | 5684 | |
| css.selectors.-webkit-inner-spin-button | Safari on iOS | 11/22/2010 | 5804 | |
| css.selectors.-webkit-meter-bar | Safari on iOS | 10/12/2011 | 5480 | |
| css.selectors.-webkit-meter-even-less-good-value | Safari on iOS | 10/12/2011 | 5480 | |
| css.selectors.-webkit-meter-inner-element | Safari on iOS | 9/18/2013 | 4773 | |
| css.selectors.-webkit-meter-optimum-value | Safari on iOS | 10/12/2011 | 5480 | |
| css.selectors.-webkit-meter-suboptimum-value | Safari on iOS | 10/12/2011 | 5480 | |
| css.selectors.-webkit-progress-bar | Safari on iOS | 9/18/2013 | 4773 | |
| css.selectors.-webkit-progress-inner-element | Safari on iOS | 9/18/2013 | 4773 | |
| css.selectors.-webkit-progress-value | Safari on iOS | 9/18/2013 | 4773 | |
| css.selectors.-webkit-resizer | Safari on iOS | 4/3/2010 | 6037 | |
| css.selectors.-webkit-scrollbar | Safari on iOS | 6/17/2009 | 6327 | Safari on iOS: From Safari 13, only display: none works with this pseudo-element. Other styles have no effect.WebView on iOS: From Safari 13, only display: none works with this pseudo-element. Other styles have no effect. |
| css.selectors.-webkit-search-cancel-button | Safari on iOS | 6/29/2007 | 7046 | |
| css.selectors.-webkit-search-results-button | Safari on iOS | 6/29/2007 | 7046 | |
| css.selectors.active-view-transition 📋 | Safari on iOS | 9/16/2024 | 757 | |
| css.selectors.attribute.case_sensitive_modifier | Firefox | 3/19/2019 | 2765 | |
| css.selectors.buffering 📋 | Safari on iOS | 3/14/2022 | 1674 | |
| css.selectors.cue.selector_argument | Safari on iOS | 9/18/2013 | 4773 | |
| css.selectors.first-child.no_parent_required | Firefox | 3/7/2017 | 3507 | |
| css.selectors.first-letter.dutch_ij_digraph | Firefox | 3/23/2021 | 2030 | |
| css.selectors.first-letter.svg_text_element | Firefox | 3/19/2024 | 938 | |
| css.selectors.first-line.svg_text_element | Firefox | 3/19/2024 | 938 | |
| css.selectors.fullscreen.all_elements | Firefox | 12/15/2015 | 3955 | |
| css.selectors.future 📋 | Safari on iOS | 9/18/2013 | 4773 | |
| css.selectors.grammar-error 📋 | Safari on iOS | 3/5/2024 | 952 | |
| css.selectors.highlight 📋 | Safari on iOS | 12/11/2023 | 1037 | Firefox: Cannot yet be used with text-decoration and text-shadow.Safari: The style is ignored when combined with user-select: none. See bug 278455.Safari on iOS: The style is ignored when combined with user-select: none. See bug 278455.WebView on iOS: The style is ignored when combined with user-select: none. See bug 278455. |
| css.selectors.last-child.no_parent_required | Firefox | 3/7/2017 | 3507 | |
| css.selectors.left 📋 | Safari on iOS | 11/22/2010 | 5804 | |
| css.selectors.marker.animation_and_transition_support | Firefox | 8/25/2020 | 2240 | |
| css.selectors.muted 📋 | Safari on iOS | 3/14/2022 | 1674 | |
| css.selectors.nth-child.no_parent_required | Firefox | 3/7/2017 | 3507 | |
| css.selectors.nth-last-child.no_parent_required | Firefox | 3/7/2017 | 3507 | |
| css.selectors.only-child.no_parent_required | Firefox | 3/7/2017 | 3507 | |
| css.selectors.past 📋 | Safari on iOS | 9/18/2013 | 4773 | |
| css.selectors.paused 📋 | Safari on iOS | 3/14/2022 | 1674 | |
| css.selectors.picture-in-picture 📋 | Safari on iOS | 3/24/2020 | 2394 | |
| css.selectors.playing 📋 | Safari on iOS | 3/14/2022 | 1674 | |
| css.selectors.right 📋 | Safari on iOS | 11/22/2010 | 5804 | |
| css.selectors.seeking 📋 | Safari on iOS | 3/14/2022 | 1674 | |
| css.selectors.selection 📋 | Firefox | 9/5/2018 | 2960 | |
| css.selectors.spelling-error 📋 | Safari on iOS | 3/5/2024 | 952 | |
| css.selectors.stalled 📋 | Safari on iOS | 3/14/2022 | 1674 | |
| css.selectors.view-transition 📋 | Safari on iOS | 9/16/2024 | 757 | |
| css.selectors.view-transition-group 📋 | Safari on iOS | 9/16/2024 | 757 | |
| css.selectors.view-transition-image-pair 📋 | Safari on iOS | 9/16/2024 | 757 | |
| css.selectors.view-transition-new 📋 | Safari on iOS | 9/16/2024 | 757 | |
| css.selectors.view-transition-old 📋 | Safari on iOS | 9/16/2024 | 757 | |
| css.selectors.volume-locked 📋 | Safari on iOS | 3/14/2022 | 1674 | |
| css.types.attr.fallback | Firefox | 10/24/2023 | 1085 | |
| css.types.basic-shape.path.d 📋 | Firefox | 2/8/2022 | 1708 | |
| css.types.color.system-color.mark_marktext_buttonborder 📋 | Firefox | 1/17/2023 | 1365 | |
| css.types.image.cross-fade 📋 | Safari on iOS | 3/21/2016 | 3858 | Chrome: Supports the original dual-image with percentage implementation only.Chrome: See bug 40470742 for supporting the unprefixed cross-fade() function.Chrome Android: Supports the original dual-image with percentage implementation only.Chrome Android: See bug 40470742 for supporting the unprefixed cross-fade() function.Edge: Supports the original dual-image with percentage implementation only.Edge: See bug 40470742 for supporting the unprefixed cross-fade() function.Quest Browser: Supports the original dual-image with percentage implementation only.Quest Browser: See bug 40470742 for supporting the unprefixed cross-fade() function.Opera: Supports the original dual-image with percentage implementation only.Opera: See bug 40470742 for supporting the unprefixed cross-fade() function.Opera Android: Supports the original dual-image with percentage implementation only.Opera Android: See bug 40470742 for supporting the unprefixed cross-fade() function.Safari: Supports the original dual-image with percentage implementation only.Safari: Supports the original dual-image with percentage implementation only.Safari on iOS: Support for the original dual-image with percentage implementation only.Safari on iOS: Supports the original dual-image with percentage implementation only.Samsung Internet: Supports the original dual-image with percentage implementation only.Samsung Internet: See bug 40470742 for supporting the unprefixed cross-fade() function.WebView Android: Supports the original dual-image with percentage implementation only.WebView Android: See bug 40470742 for supporting the unprefixed cross-fade() function.WebView on iOS: Support for the original dual-image with percentage implementation only.WebView on iOS: Supports the original dual-image with percentage implementation only. |
| css.types.image.element 📋 | Firefox | 11/14/2017 | 3255 | Firefox: -moz-element() is limited to background-image, background, border-image and border-image-source.Firefox: -moz-element() is limited to background-image and background.Firefox for Android: -moz-element() is limited to background-image, background, border-image and border-image-source.Firefox for Android: -moz-element() is limited to background-image and background. |
| css.types.length.rcap 📋 | Safari on iOS | 12/11/2023 | 1037 | |
| css.types.length.rch 📋 | Safari on iOS | 12/11/2023 | 1037 | |
| css.types.length.rex 📋 | Safari on iOS | 12/11/2023 | 1037 | |
| css.types.length.ric 📋 | Safari on iOS | 12/11/2023 | 1037 | |
| css.types.ratio.number_value | Firefox | 6/30/2020 | 2296 | |
| css.types.text-edge 📋 | Safari on iOS | 12/11/2024 | 671 | |
| css.types.text-edge.alphabetic 📋 | Safari on iOS | 12/11/2024 | 671 | |
| css.types.text-edge.cap 📋 | Safari on iOS | 12/11/2024 | 671 | |
| css.types.text-edge.ex 📋 | Safari on iOS | 12/11/2024 | 671 | |
| css.types.text-edge.text 📋 | Safari on iOS | 12/11/2024 | 671 |
| API | First Browser | Date | Days in Limbo | Notes |
|---|---|---|---|---|
| html.elements.a.attributionsourceid 📋 | Safari on iOS | 4/26/2021 | 1996 | |
| html.elements.a.coords 📋 | Safari on iOS | 6/29/2007 | 7046 | 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 | 5285 | |
| html.elements.a.shape 📋 | Safari on iOS | 6/29/2007 | 7046 | 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 on iOS | 9/19/2019 | 2581 | |
| html.elements.canvas.moz-opaque | Firefox | 6/30/2009 | 6314 | |
| html.elements.col.char 📋 | Safari on iOS | 7/11/2008 | 6668 | |
| html.elements.col.charoff 📋 | Safari on iOS | 7/11/2008 | 6668 | |
| html.elements.colgroup.char 📋 | Safari on iOS | 7/11/2008 | 6668 | |
| html.elements.colgroup.charoff 📋 | Safari on iOS | 7/11/2008 | 6668 | |
| html.elements.form.autocomplete.new-password | Firefox | 5/21/2019 | 2702 | |
| html.elements.iframe.allow.autoplay 📋 | Firefox | 3/10/2020 | 2408 | |
| html.elements.iframe.allow.display-capture 📋 | Firefox | 3/10/2020 | 2408 | |
| html.elements.iframe.allow.document-domain 📋 | Firefox | 3/10/2020 | 2408 | |
| html.elements.iframe.allow.encrypted-media 📋 | Firefox | 3/10/2020 | 2408 | |
| html.elements.iframe.allow.fullscreen 📋 | Firefox | 8/25/2020 | 2240 | |
| html.elements.iframe.allow.gamepad 📋 | Firefox | 8/10/2021 | 1890 | 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 | 2408 | |
| html.elements.iframe.allow.midi 📋 | Firefox | 3/10/2020 | 2408 | |
| html.elements.iframe.allow.payment 📋 | Firefox | 3/10/2020 | 2408 | |
| html.elements.iframe.allow.publickey-credentials-create 📋 | Firefox | 2/20/2024 | 966 | |
| html.elements.iframe.allow.publickey-credentials-get 📋 | Firefox | 9/26/2023 | 1113 | |
| html.elements.iframe.allow.speaker-selection 📋 | Firefox | 8/1/2023 | 1169 | Firefox for Android: Not available due to a limitation in Android (see bug 1473346). |
| html.elements.iframe.allow.web-share 📋 | Firefox | 9/22/2020 | 2212 | 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 | 3675 | |
| html.elements.iframe.sandbox.allow-pointer-lock 📋 | Firefox | 9/20/2016 | 3675 | |
| html.elements.iframe.sandbox.allow-presentation 📋 | Firefox | 11/15/2016 | 3619 | |
| html.elements.input.capture 📋 | Safari on iOS | 9/13/2016 | 3682 | |
| html.elements.input.type_month 📋 | Safari on iOS | 3/29/2018 | 3120 | Safari: The input type is recognized, but there is no month-specific control. See bug 200416. |
| html.elements.input.type_password.insecure_login_handling | Firefox | 3/7/2017 | 3507 | |
| html.elements.input.type_week 📋 | Safari on iOS | 12/11/2024 | 671 | |
| html.elements.input.webkitdirectory | Firefox | 11/15/2016 | 3619 | Chrome Android: In Chrome for Android 131, choosing a directory crashes the browser (see bug 376834374).Chrome Android: Before version 131, users cannot choose a directory, only individual files (see bug 40248532.Opera Android: In Chrome for Android 131, choosing a directory crashes the browser (see bug 376834374).Opera Android: Before version 87, users cannot choose a directory, only individual files (see bug 40248532.Safari on iOS: The attribute can be set but users cannot choose a directory, only individual files (see bug 271705).WebView Android: In Chrome for Android 131, choosing a directory crashes the browser (see bug 376834374).WebView Android: Before version 131, users cannot choose a directory, only individual files (see bug 40248532.WebView on iOS: The attribute can be set but users cannot choose a directory, only individual files (see bug 271705). |
| html.elements.link.blocking 📋 | Safari on iOS | 12/11/2024 | 671 | |
| html.elements.link.rel.alternate_stylesheet 📋 | Firefox | 6/17/2008 | 6692 | |
| html.elements.link.rel.icon | Firefox | 10/24/2006 | 7294 | Chrome: If both ICO and PNG are available, will use ICO over PNG if ICO has better matching sizes set. (Per caniuse.com.).Edge: In version 79 and later (Blink-based Edge), if both ICO and PNG are available, will use ICO over PNG if ICO has better matching sizes set. (Per caniuse.com.)Firefox: Before Firefox 83, the crossorigin attribute is not supported for rel="icon".Firefox: The media attribute is not supported for rel="icon", see bug 1603885.Opera: In version 15 and later (Blink-based Opera), if both ICO and PNG are available, will use ICO over PNG if ICO has better matching sizes set. (Per caniuse.com.)Safari: If both ICO and PNG are available, will ALWAYS use ICO file, regardless of sizes set. (Per caniuse.com.)Safari on iOS: Does not use favicons at all (but may have alternative for bookmarks, etc.). (Per caniuse.com.)WebView on iOS: Does not use favicons at all (but may have alternative for bookmarks, etc.). (Per caniuse.com.) |
| html.elements.link.rel.manifest 📋 | Safari on iOS | 3/29/2018 | 3120 | |
| html.elements.link.rel.preload.as-track | Safari on iOS | 3/29/2018 | 3120 | |
| html.elements.meta.name.theme-color 📋 | Safari on iOS | 9/20/2021 | 1849 | 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 on iOS | 12/11/2024 | 671 | |
| html.elements.script.type.importmap.integrity 📋 | Safari on iOS | 9/16/2024 | 757 | |
| html.elements.select.size 📋 | Firefox | 11/9/2004 | 8008 | |
| html.elements.style.blocking 📋 | Safari on iOS | 12/11/2024 | 671 | |
| html.elements.summary.display_list_item | Firefox | 9/20/2016 | 3675 | |
| html.elements.tbody.char | Safari on iOS | 4/3/2010 | 6037 | |
| html.elements.td.char | Safari on iOS | 4/3/2010 | 6037 | |
| html.elements.td.rowspan.rowspan_zero | Firefox | 8/8/2017 | 3353 | |
| html.elements.template.shadowrootclonable 📋 | Firefox | 4/16/2024 | 910 | |
| html.elements.template.shadowrootdelegatesfocus 📋 | Firefox | 2/20/2024 | 966 | |
| html.elements.textarea.autocomplete.new-password | Firefox | 5/21/2019 | 2702 | |
| html.elements.tfoot.char | Safari on iOS | 4/3/2010 | 6037 | |
| html.elements.th.char | Safari on iOS | 4/3/2010 | 6037 | |
| html.elements.th.rowspan.rowspan_zero | Firefox | 8/8/2017 | 3353 | |
| html.elements.thead.char | Safari on iOS | 4/3/2010 | 6037 | |
| html.elements.tr.char | Safari on iOS | 4/3/2010 | 6037 | |
| html.elements.tr.charoff | Safari on iOS | 4/3/2010 | 6037 | |
| html.elements.video.disableremoteplayback 📋 | Safari on iOS | 9/19/2019 | 2581 | |
| html.elements.video.playsinline 📋 | Safari on iOS | 9/13/2016 | 3682 | |
| html.global_attributes.autocorrect 📋 | Safari on iOS | 4/26/2021 | 1996 | 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 on iOS | 3/24/2020 | 2394 | |
| html.global_attributes.is 📋 | Firefox | 10/23/2018 | 2912 | |
| html.global_attributes.writingsuggestions 📋 | Safari on iOS | 9/16/2024 | 757 | |
| html.manifest.display 📋 | Safari on iOS | 3/29/2018 | 3120 | 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 on iOS | 3/29/2018 | 3120 | |
| html.manifest.display.standalone 📋 | Safari on iOS | 3/29/2018 | 3120 | |
| html.manifest.icons 📋 | Safari on iOS | 3/14/2022 | 1674 | 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 on iOS | 3/27/2023 | 1296 | Firefox: The property parses, but has no effect. |
| html.manifest.name 📋 | Safari on iOS | 3/29/2018 | 3120 | 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 on iOS | 3/29/2018 | 3120 | |
| html.manifest.short_name 📋 | Safari on iOS | 3/29/2018 | 3120 | 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.start_url 📋 | Safari on iOS | 3/29/2018 | 3120 | 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 on iOS | 9/20/2021 | 1849 |