Software:Comparison of browser engines (CSS support)

Short description: None

This article compares Cascading Style Sheets (CSS) support for several browser engines.

Explanation of the tables

Engine	Status	Embedded in
WebKit	Active	Safari browser, plus all browsers hosted on the iOS App Store.
Blink	Active	Google Chrome and other web browsers based on Chromium, such as Microsoft Edge, Opera, and Brave.
EdgeHTML	Active	Universal Windows Platform apps; formerly in the Edge browser^[1].
Gecko	Active	Firefox browser and Thunderbird email client, plus forks like SeaMonkey and Waterfox.
KHTML	Discontinued	Konqueror browser
Presto	Discontinued	Formerly used as Opera's browser engine, prior to the migration to Chromium and Blink.
Trident	Discontinued	Internet Explorer and versions of Microsoft Outlook prior to Outlook 2007.

Values

These indicate the level of support for the given item in each engine. By default, the most recent version of the engine is implied. However, a specific version number can be listed; when this indicates full support, it's the initial version of the engine fully supporting the item.

Value	Meaning
Yes	Fully supported
No	Has never been supported
Partial	Only some values are supported
Incorrect	Not implemented correctly in all cases
Experimental	May be incomplete or buggy
Nightly build	Currently in development; full support is expected
Depends	Only supported for the specified conditions
Dropped	No longer supported

Other notes

Vendor-specific

The DOM properties corresponding to vendor-specific experimental CSS properties are prefixed with the vendor-prefix, without any hyphens, and with first letters capitalised, e.g. element.style.MozBorderRadius corresponding to the -moz-border-radius property, or element.style.OTransform corresponding to the -o-transform property. The exception is MSHTML, which used a lower-case prefix, e.g. element.style.msTransform.

Gecko: -moz- — All experimental selectors, properties and values are prefixed with "-moz-", e.g. ::-moz-selection instead of ::selection.
Webkit: -webkit- — All experimental selectors, properties and values are prefixed with "-webkit-", e.g. -webkit-box-shadow instead of box-shadow.
MSHTML: -ms- — All experimental properties are prefixed with "-ms-", e.g. -ms-interpolation-mode instead of interpolation-mode.
KHTML: -khtml- — All experimental selectors, properties and values are prefixed with "-khtml-", e.g. -khtml-opacity instead of opacity.
Presto: -o- — All experimental properties are prefixed with "-o-", e.g. -o-transition-property instead of transition-property.

Abbreviations

CSS1 : Cascading Style Sheets (CSS1) Level 1 Specification^{[spec 1]}
CSS2 : Cascading Style Sheets Level 2 Revision 1 (CSS 2.1) Specification^{[spec 2]}
CSS3 : CSS Module Level 3
CSS4 : CSS Module Level 4

Grammar and rules

			MSHTML	EdgeHTML	Gecko	WebKit	KHTML	Presto
CSS2	`!important`	Weight increasing	7.0	12	1.0	85	Yes	1.0
	`/Comment/`	Comments	3.0	12	1.0	85	Yes	1.0
	`@import`	Import stylesheet	8.0	12	1.0	Yes	Yes	1.0
	`@charset`	Character set	5.5	12	1.0	Yes	4.2.3	1.0
	`@media`	Media-specific rules	5.5	12	1.0	Yes	Yes	1.0
css- namespace-3	`@namespace`	Namespace declaration	9.0^{[t 1]}	12	1.0	Yes	Yes	1.0
earlier draft of css3- conditional	`@document`	Restriction by URLs	No	No	6.0	No	No	No
css- animations-1	`@keyframes`	Animation key	10.0^{[t 2]}	12	16.0	Experimental	No	2.12
css- conditional-3	`@supports`	Conditional Rules	No	12	22.0^{[g 1]}	28.0^{[w 1]}	No	2.12
css-counter- styles-3	`@counter-style`	Custom Counter Styles	No	No	33.0^{[g 2]}	No	No	No
css-device- adapt-1	`@viewport`	Viewport, Device Adaptation	10.0^{[t 3]}	12.0	No^{[w 2]}	No	No	2.7.62^{[p 1]}
filter- effects-1	`@filter`	Filter	No	No	35.0	Experimental	No	No
Page
CSS2	`@page`	For paged media	8.0	12	19.0^{[g 3]}	Nightly Build^{[w 3]}	No	1.0
css-page-3	`@top-left-corner`	Margin boxes^{[spec 3]}	No	No	No	No^{[w 4]}	No	No
	`@top-left`
	`@top-center`
	`@top-right`
	`@top-right-corner`
	`@bottom-left-corner`
	`@bottom-left`
	`@bottom-center`
	`@bottom-right`
	`@bottom-right-corner`
	`@left-top`
	`@left-middle`
	`@left-bottom`
	`@right-top`
	`@right-middle`
	`@right-bottom`
Font
css-fonts-3	`@font-face`	Define font	9.0^{[t 4]}	12	1.9.1	525	4.3	2.2
	`@font-feature-values`	Define font features	No	No	34.0	No	No	No
	`@annotation`	Font feature value block	No	No		No	No	No
	`@styleset`		No	No		No	No	No
	`@swash`		No	No		No	No	No
	`@ornaments`		No	No		No	No	No
	`@stylistic`		No	No		No	No	No
	`@character-variant`		No	No		No	No	No
			MSHTML	EdgeHTML	Gecko	WebKit	KHTML	Presto

MSHTML notes

!important — Prior to 7.0, !important doesn't override rules defined later in the same declaration block.
@import — Prior to 8.0, media type support is broken. For @import <URL> <MEDIA>, IE requests as the URL "<URL> <MEDIA>" and will include the url() token and/or quotes in the URL, too, if present. Cannot import more than 35 stylesheets.

Presto notes

@import — Whilst Gecko, WebKit and iCab download all media stylesheets immediately, Opera only downloads handheld, print, projection and screen media, as well as speech if "voice" feature is enabled and TV, on TV devices. Text browser emulation mode is only a user stylesheet, so it does not switch to tty media type. This is consistent with older text browsers, which do not respect any CSS.

Selectors

			MSHTML	EdgeHTML	Gecko	WebKit	KHTML	Presto
Element selectors^{[spec 4]}
CSS2	`*`	Universal	7.0	12	1.0	85	Yes	1.0
	`E`	Element	4.0	12	1.0	85	Yes
	`E.class`	Class	7.0	12	1.0	85	Yes
	`E#id`	ID	4.0	12	1.0	85	Yes
selectors-3	`ns\|E`	Namespaced	9.0	12	1.0	Yes	Yes
Relationship selectors
CSS2	`E F`	Descendant	4.0	12	1.0	85	Yes	1.0
	`E > F`	Child	7.0	12	1.0	85	Yes
	`E + F`	Direct adjacent	7.0	12	1.0	85	Yes
selectors-3	`E ~ F`	Indirect adjacent	7.0	12	1.7	412	3.3.2	2.0
selectors-4	`E /for/ F`	Reference combinators	No	No	No	No	No	No
	`E! > F`	Subject	No	No	No^{[g 4]}	No	No	No
	`F \|\| E`	Column relation	No	No	No	No	No	No
Attribute selectors
CSS2	`E[attr]`	Has	7.0	12	1.0	85	Yes	1.0
	`E[attr="value"]`	Equals	7.0	12	1.0	Yes	Yes
	`E[attr~="value"]`	Contains (space-separated)	7.0	12	1.0	Yes	Yes
	`E[attr\|="value"]`	Contains (hyphen-separated)	7.0	12	1.0	Yes	Yes
selectors-3	`E[attr^="value"]`	Begins with	7.0	12	1.0	Yes	3.4	1.0
	`E[attr$="value"]`	Ends with	7.0	12	1.0	Yes	3.4	2.0
	`E[attr*="value"]`	Contains substring	7.0	12	1.0	Yes	3.4
	`E[ns\|attr]`	Namespaced	7.0	12	1.0	Yes	3.4
selectors-4	`E[foo="bar" i]`	Case-sensitivity	No	No	No	No	No	No
Pseudo-classes
CSS2	`E:link`	Unvisited hyperlink	3.0	12	1.0	85	Yes	1.0
	`E:visited`	Visited hyperlink	3.0	12	1.0	85	Yes
	`E:active`	Active	8.0	1.0	12	85	Yes
	`E:hover`	Mouseover	7.0	12	1.0	419.3	Yes
	`E:focus`	Focused	8.0	12	1.0	Yes	Yes
	`E:first-child`	First child	7.0	12	1.0	85	Yes
	`E:lang()`	Language	8.0	12	1.2	525	3.4
	`@page:first`	First page	8.0	12	No^{[g 5]}	Yes^{[w 5]}	No
	`@page:left`	Left page
	`@page:right`	Right page
selectors-3	`E:root`	Root	9.0	12	1.0	85	3.4	2.1
	`E:not()`	Negation			1.0	85
	`E:empty`	Empty			1.8	412
	`E:first-of-type`	First child of type			1.9.1	525
	`E:last-child`	Last child			1.0
	`E:last-of-type`	Last child of type			1.9.1
	`E:only-child`	Only child			1.8
	`E:only-of-type`	Only child of type			1.9.1
	`E:nth-child`	N^th child			1.9.1
	`E:nth-last-child`	N^th last child			1.9.1
	`E:nth-of-type`	N^th child of type			1.9.1
	`E:nth-last-of-type`	N^th last child of type			1.9.1
	`E:target`	Target			1.3			2.5
	`E:enabled`	Enabled state			1.8			2.0
	`E:disabled`	Disabled state			1.8
	`E:checked`	Checked state			1.0
selectors-4	`E:indeterminate`	Indeterminate state			1.9.2	522	No	No
	`E:default`	Default	No	No	1.9	Yes^{[w 6]}	4.3	2.0
	`E:valid`	Valid	10.0^{[t 5]}	12	1.8	Yes^{[w 7]}	No
	`E:invalid`	Invalid	10.0^{[t 6]}	12		Yes^{[w 7]}
	`E:in-range`	In range	No	13		Yes^{[w 8]}
	`E:out-of-range`	Out of range	No	13		Yes^{[w 8]}
	`E:required`	Required	10.0^{[t 7]}	12	2.0^{[g 6]}	Yes^{[w 9]}
	`E:optional`	Optional	10.0^{[t 8]}	12	2.0^{[g 6]}	Yes^{[w 9]}
	`E:read-only`	Read-only	No	13	78^{[g 7]}	530	Incorrect	Incorrect
	`E:read-write`	Read and write	No	13	78^{[g 7]}	530	Incorrect	Incorrect
	`E:not(s1, s2)`	Negations	No	No	84	No	No	No
	`E:is(s1, s2)`	Matches-any			82^{[g 8]}
	`E:has(s1)`	Relational pseudo-class			No
	`E:dir(ltr)`	Directionality			49^{[g 9]}
	`E:lang(zh, *-hant)`	Languages			No
	`E:any-link`	Hyperlink			50.0^{[g 10]}
	`E:local-link`	Local link			No
	`E:local-link(0)`	Local link			No
	`E:scope`	Contextual reference			32^{[g 11]}
	`E:current`	Time-dimensional : current			No
	`E:current(s)`	Time-dimensional : current
	`E:past`	Time-dimensional : past
	`E:future`	Time-dimensional : future
	`E:nth-match(n of selector)`	N^th child of
	`E:nth-last-match(n of selector)`	N^th last child of
	`E:column(selector)`	Column
	`E:nth-column(n)`	N^th column
	`E:nth-last-column(n)`	N^th last column
	`E:placeholder-shown`	placeholder text
	`E:active-drop`	will receive the item
	`E:valid-drop`	could receive the item
	`E:invalid-drop`	cannot receive the item
Pseudo-elements
CSS2	`E:first-letter`	First letter	9.0	12	1.0	85	Yes	1.0
	`E:first-line`	First line	9.0		1.0	Partial
	`E:before`	Before	8.0		1.9.1	Partial
	`E:after`	After	8.0		1.9.1	Partial
selectors-3	`E::before`	Double colon notation	9.0	12	1.9.1	Partial	3.4	1.0
	`E::after`	Double colon notation			1.9.1	Partial
	`E::first-letter`	Double colon notation			1.5	85
	`E::first-line`	Double colon notation			1.5	Partial
css-pseudo-4	`E::marker`^{[spec 5]}	list marker	No	No	68	No	No	No
css-pseudo-4	`E::selection`	Selection	9.0	12	62	412	3.4	2.1
CSS UI pseudo elements	`E::value`	user interface element fragments^{[spec 6]}	No	No	No	No	No	No
	`E::choices`
	`E::repeat-item`
	`E::repeat-index`
			MSHTML	EdgeHTML	Gecko	WebKit	KHTML	Presto

General notes

:read-only and :read-write — Both Presto and KHTML handle the case of the contenteditable attribute incorrectly.

MSHTML notes

:active — Prior to 8.0, :active is only supported on anchor elements.
:hover — Prior to 7.0, :hover is only supported on anchor elements.
.one.two — Prior to 7.0, only .two class selector was taken into consideration.
* — Prior to 7.0 this was treated as a single or no element.
[attr] — Matches every td and th in a table when the attribute is colspan (regardless of whether any actually have a colspan attribute).^{[t 9]} This may not actually be a bug, as ambiguity exists in the specification.^{[t 10]}
:first-letter, :first-line — Prior to IE9 in 6.0, combining :first-letter rules with others may be problematic.^{[t 11]} In 8.0, rules with !important are ignored inside :first-line and :first-letter declarations.^{[t 12]}

Gecko notes

(:):before, (:):after — CSS2.0 behavior : some properties are unimplemented prior to 1.9.1.^{[g 12]}

WebKit notes

:lang() — Only detected when explicitly present on element being tested, attribute not inherited.
(:):first-line — text-transform doesn't apply with this pseudo-element.^{[w 10]}
(:):before/after — some styles can't be applied to :before and :after pseudo-elements, such as animations and transitions.^{[w 11]}

Presto notes

:target — Prior to 2.5, styles aren't applied when navigating using back and forward buttons.

Properties

		MSHTML	EdgeHTML	Gecko	WebKit	KHTML	Presto
Cascading and Inheritance
css- cascade-3	`all`	No	No	27.0^{[g 13]}	No	No	No
Display
CSS2	`display`	8.0	12	1.9	85	Yes	1.0
Earlier draft of css- display-3	`display-inside`	No	No	No	No	No	No
	`display-outside`
	`display-list`
css- display-3	`box-suppress`
Box Model^{[spec 7]}
CSS2	`margin`	9.0	12	1.0	85	Yes	1.0
	`padding`	4.0		1.0	85	Yes
	`width`	4.0		1.0	85	Yes
	`height`	4.0		1.0	85	Yes
	`float`	5.0		1.0	85	Yes
	`clear`	5.0		1.0	85	Yes
	`min-width`	7.0		1.0	Partial	Yes
	`max-width`	7.0		1.0	Partial	Yes
	`min-height`	7.0		1.7	Partial	3.3.2
	`max-height`	7.0		1.7	Partial	3.3.2
	`visibility`	9.0		1.8	Partial	Partial	2.5
Overflow
CSS2	`overflow`	9.0	12	1.0	85	3.2	1.0
css- overflow- 3	`overflow-x`	9.0	12	1.8	525	3.5.6	2.1
	`overflow-y`	9.0	12	1.8	525	3.5.6	2.1
	`max-lines`	No	No	No	No	No	No
Borders
CSS2	`border`	4.0	12	1.0	85	Yes	1.0
	`border-color`	7.0
	`border-style`	8.0
	`border-width`	4.0
	`border-top`	5.5
	`border-right`
	`border-bottom`
	`border-left`
css- backgrounds-3	`border-radius`	9.0^{[t 1]}	12	2.0^{[g 14]}	533^{[w 12]}	Experimental	2.5
	`border-image`	11.0		15.0^{[g 15]}	Experimental	No	2.5
	`border-image-source`			15.0^{[g 16]}	No		No
	`border-image-slice`
	`border-image-width`
	`border-image-outset`
	`border-image-repeat`
	`box-shadow`	9.0^{[t 13]}		2.0^{[g 17]} ^{[g 18]}	Yes^{[w 13]}	No	2.5
	`box-decoration-break`	No	No	32.0^{[g 19]}	No^{[w 14]}	No	2.7^{[p 2]}
		MSHTML	EdgeHTML	Gecko	WebKit	KHTML	Presto
Line Layout^{[spec 8]}
CSS2	`line-height`	4.0	12	1.0	85	Yes	1.0
CSS2	`vertical-align`	8.0	12	1.0	85	Yes	1.0
Positioning
CSS2	`position`	7.0	12	1.0	85	Yes	1.0
	`top`	8.0		1.0	85	Yes
	`right`	8.0		1.0	85	Yes
	`bottom`	8.0		1.0	85	Yes
	`left`	8.0		1.0	85	Yes
	`z-index`	8.0		1.9	85	Yes
Box Alignment Module
css-align-3
	`align-content`	11.0	12	28.0	Experimental	No	No
	`align-items`			20.0
	`align-self`
	`justify-content`
	`justify-items`	No		No	No
	`justify-self`	No		No	No
Generated and Replaced Content^{[spec 9]}
CSS2	`quotes`	8.0	12	Yes	412^{[w 15]}	3.4	1.0
	`content`	9.0^{[t 14]}		1.9	Partial	Yes	2.7
	`counter-increment`	8.0		1.8	525	3.4	1.0
	`counter-reset`	8.0		1.8	525	3.4	1.0
Lists^{[spec 10]}
CSS2	`list-style`	4.0	12	1.0	85	Yes	1.0
	`list-style-image`	4.0		1.0	85	Yes
	`list-style-position`	4.0		1.0	85	Yes
	`list-style-type`	8.0		1.0	85	3.4
Colors
CSS2	`color`	3.0	12	1.0	85	Yes	1.0
css-color-3	`opacity`	9.0^{[t 1]}	12	1.7	125	4.0	2.0
		MSHTML	EdgeHTML	Gecko	WebKit	KHTML	Presto
Backgrounds
CSS2	`background`	4.0	12	1.0	85	Yes	1.0
	`background-attachment`	7.0
	`background-color`	4.0
	`background-image`	8.0
	`background-position`	8.0
	`background-repeat`	4.0
css- backgrounds-3	`background (multiple)`	9.0^{[t 1]}	12	1.9.2	312	3.5	2.5
	`background-clip`			2.0^{[g 20]}	Yes^{[w 16]}	Experimental
	`background-origin`				Yes^{[w 16]}
	`background-size`				Yes^{[w 17]}
Early ideas for css- backgrounds-4	`background-position-x`	8.0^{[t 15]}	12	No	Experimental	No	No
Early ideas for css- backgrounds-4	`background-position-y`	8.0^{[t 15]}	12	No	Experimental	No	No
Fonts
CSS2	`font`	4.0	12	1.0	85	Yes	Incorrect
	`font-family`	4.0		1.0	85	Yes	1.0
	`font-size`	3.0		1.0	85	Yes
	`font-style`	4.0		1.0	85	Yes
	`font-variant`	4.0		1.0	125	Yes
	`font-weight`	8.0		Partial	Partial	Yes	Incorrect
css-fonts-3	`font-size-adjust`	10.0^{[t 16]}	12	1.9	No^{[w 18]}	No	No
	`font-stretch`	9.0^{[t 1]}		9.0^{[g 21]}	No^{[w 19]}	No	No
	`font-feature-settings`	10.0^{[t 17]}		34.0^[2]^{[g 22]}	No^{[w 20]}	No	No
	`font-kerning`	No	No		No	No	No
	`font-language-override`	No			No	No	No
	`font-synthesis`	No			No	No	No
	`font-variant-alternates`	No			No	No	No
	`font-variant-caps`
	`font-variant-east-asian`
	`font-variant-ligatures`
	`font-variant-numeric`
	`font-variant-position`
	`unicode-range`	9.0^{[t 18]}	12	38.0^{[g 23]}	No	No	No
Text
CSS2	`text-align`	4.0	12	1.0	85	Yes	1.0
	`text-decoration`	Yes		1.0	85	Yes
	`text-indent`	3.0		1.0	85	Yes
	`text-transform`	4.0		1.0	85	Yes
	`letter-spacing`	4.0		1.0	85	Yes
	`word-spacing`	8.0		1.0	85	Yes
	`white-space`	8.0		1.9.1	522	Yes	2.1
css-text-3	`word-break`	Partial	Partial	15.0^{[g 24]}	No	No	No
	`line-break`	11.0	12	No	No	No	No
	`hyphens`	10.0^{[t 19]}	12	6.0^{[g 25]}	Experimental	No	No
	`word-wrap`	5.0	12	1.9.1	85	4.3	2.5
	`overflow-wrap`	No	No	No^{[g 26]}	No	No	No
	`text-align-last`	Partial	Partial	12.0^{[g 27]}	No^{[w 21]}	No	No
	`text-justify`	5.5	12	No^{[g 28]}	No	No	No
	`text-emphasis`	No	No	No	No	No	No
	`hanging-punctuation`	No	No	No	No^{[w 22]}	No	No
Early ideas for css- text-4	`hyphenate-character`	No	No	No	No	No	No
	`hyphenate-limit-zone`	10.0^{[t 20]}	12
	`hyphenate-limit-chars`	10.0^{[t 21]}	12
	`hyphenate-limit-lines`	10.0^{[t 22]}	12
	`hyphenate-limit-last`	No	No
	`text-space-collapse`
	`text-spacing`
	`text-wrap`
Text Decoration
css-text- decor-3	`text-shadow`	10.0^{[t 23]}	12	1.9.1	Yes	3.4	2.1
	`text-decoration-style`	No	No	36.0^{[g 29]}^{[g 30]}	No^{[w 23]}	No	No
	`text-decoration-color`	No	No			No	No
	`text-decoration-line`	No	No			No	No
	`text-decoration-skip`	No	No	No		No	No
	`text-underline-position`	11.0	12	No	No	No	No
	`text-emphasis-style`	No	No	No	No	No	No
	`text-emphasis-color`
	`text-emphasis`
	`text-emphasis-position`
		MSHTML	EdgeHTML	Gecko	WebKit	KHTML	Presto
Writing Modes
CSS2	`direction`	5.0	12	1.0	85	Yes	1.0
CSS2	`unicode-bidi`	5.0	12	1.0	525	Yes	1.0
css- writing- modes-3	`writing-mode`	7.0^{[t 24]}	12	No^{[g 31]}	Nightly Build^{[w 24]}	No	No
	`text-combine-horizontal`	11.0^{[t 25]}	12.0	No	No	No	No
	`text-orientation`	No	No	No	No	No	No
Tables
CSS2	`border-collapse`	8.0	12	1.0	125	Yes	1.0
	`border-spacing`	8.0		1.0	125	Yes
	`caption-side`	8.0		1.4	85	Yes
	`empty-cells`	8.0		1.0	125	Yes
	`table-layout`	5.0		1.0	85	Yes
User interface
CSS2	`cursor`	5.5	12	1.8	125	Yes	Partial
	`outline`	8.0		1.8	125	Yes	1.0
	`outline-color`	8.0		1.8	125	Yes
	`outline-style`	8.0		1.8	125	Yes
	`outline-width`	8.0		1.8	125	Yes
css-ui-3	`outline-offset`	No	No	1.8	125	3.5	2.1
	`box-sizing`	8.0	12	29.0^{[g 32]}	Yes^{[w 25]}	3.3.2	1.0
	`resize`	No	No	2.0^{[g 33]}	525	No	No
	`appearance`	No	12	Experimental	Experimental	No	No
	`icon`	No	No	No	No	No	No
	`nav-index`	No		No	No	No	2.1
	`nav-up`	No		No	No	No
	`nav-right`	No		No	No	No
	`nav-down`	No		No	No	No
	`nav-left`	No		No	No	No
	`text-overflow`	Partial	Partial	7.0^{[g 34]}	Partial	3.5.6	Experimental (Nightly)^{[p 3]}
Paged media
CSS2
	`page-break-before`	4.0	12	Partial	Partial	3.5	1.0
	`page-break-after`	4.0		Partial	Partial
	`page-break-inside`	8.0		19.0^{[g 35]}	312
	`orphans`			No^{[g 36]}
`widows`				No^{[g 36]}
css-page-3	`page`	No	No	No	No	No	No
	`size`	No		No^{[g 37]}	No^{[w 26]}	No	1.0
	`image-orientation`	No		26.0^{[g 38]}	No	No	No
	`object-fit`	No		36.0^{[g 39]}	No	No	2.7^{[p 4]}
	`object-position`	No		36.0^{[g 39]}	No	No	2.7^{[p 4]}
Speech
css-speech-1	`cue`	No	No	No^{[g 40]}	No	No	1.0
	`cue-after`
	`cue-before`
	`pause`
	`pause-after`
	`pause-before`
	`speak`				Nightly build^{[w 27]}
	`voice-family`				No
	`voice-balance`						Experimental
	`voice-duration`
	`voice-pitch`
	`voice-pitch-range`
	`voice-rate`
	`voice-stress`
	`voice-volume`
	`interpret-as`
	`phonemes`
	`rest`						No
	`rest-after`
	`rest-before`
	`mark`
	`mark-after`
	`mark-before`
		MSHTML	EdgeHTML	Gecko	WebKit	KHTML	Presto
Media Queries
css3- mediaqueries	`width`	9.0^{[t 26]}	12	1.9.1	525	4.1	2.0
	`height`
	`device-width`
	`device-height`
	`device-aspect-ratio`
	`color`						2.5
	`color-index`
	`monochrome`
	`resolution`				No
	`orientation`					4.2.1	No
	`aspect-ratio`					4.2.1	2.1
	`grid`	11.0		Yes		4.1	2.5
	`scan`	11.0		Yes		4.1	2.5
Ruby characters
css-ruby-1	`ruby-position`	No	No	38.0^{[g 41]}	No	No	No
	`ruby-align`			38.0^{[g 41]}
	`ruby-merge`			No
Multi-column Layout
css- multicol-1	`column-count`	10.0^{[t 27]}	12	Experimental^{[g 42]}	Experimental	No	2.8^{[p 5]}
	`column-width`
	`column-gap`
	`column-rule`
	`columns`			9.0^{[g 43]}
	`break-before`			No^{[g 44]}	Experimental^{[w 28]}
	`break-after`				Experimental^{[w 28]}
	`break-inside`				No^{[w 29]}
	`column-fill`			14.0^{[g 45]}	No
	`column-span`			No^{[g 46]}	Experimental^{[w 30]}
Grid layout
css- grid-1	`grid`	No	No	Experimental^{[g 47]}	Experimental^{[w 31]}	No	No
	`grid-template`
	`grid-template-columns`
	`grid-template-rows`
	`grid-template-areas`
	`grid-auto-columns`
	`grid-auto-rows`
	`grid-auto-flow`
	`grid-auto-position`
	`grid-columns`	10.0^{[t 28]}	12
	`grid-columns-start`	No	No
	`grid-columns-end`	No	No
	`grid-row`	10.0^{[t 29]}	12
	`grid-row-start`	No	No
	`grid-row-end`
	`grid-area`
Animation
css- animations-1
	`animation`	10.0^{[t 30]}	12	16.0^{[g 48]}	Experimental	No	2.12
	`animation-delay`
	`animation-direction`
	`animation-duration`
	`animation-iteration-count`
	`animation-name`
	`animation-play-state`
	`animation-timing-function`
	`animation-fill-mode`
Transforms
css- transforms- 1
	`transform`	10.0^{[t 31]}	12	16.0	Experimental	No	2.12
	`transform-origin`						2.12
	`transform-style`						No
	`perspective`
	`perspective-origin`
	`backface-visibility`
Transitions
css- transitions-1
	`transition-property`	10.0^{[t 32]}	12	16.0^{[g 49]}	Experimental	No	Experimental
	`transition-duration`
	`transition-timing-function`
	`transition-delay`
	`transition`
Flexible Box Layout
css- flexbox-1
	`flex`	11.0	12	22.0^{[g 50]}	9.0^{[w 32]}	No	2.12
	`flex-basis`						No
	`flex-direction`						2.12
	`flex-flow`			28.0			No
	`flex-grow`			22.0			2.12
	`flex-shrink`			22.0			No
	`flex-wrap`			28.0			No
	`order`			22.0			2.12
		MSHTML	EdgeHTML	Gecko	WebKit	KHTML	Presto
Regions
css- regions-1
	`flow-into`	10.0^{[t 33]}	12	No^{[g 51]}	Nightly build	No	No
	`flow-from`	10.0^{[t 33]}	12
	`region-fragment`	No	No
	`break-before`	No	No
	`break-after`
	`break-inside`
Exclusions
css3- exclusions
	`wrap-flow`	10.0^{[t 34]}	12	No^{[g 52]}	Nightly build	No	No
	`wrap-through`	10.0^{[t 34]}	12	No^{[g 52]}	Nightly build	No	No
Shapes
css- shapes-1
	`shape-margin`	No	No	No	Nightly build	No	No
	`shape-outside`				No
	`shape-image-threshold`				No
Masking
CSS2	`clip`	8.0	12	1.0	85	Yes	1.0
css- masking-1
	`clip-path`	No	No	1.9.1	No	No	No
	`clip-rule`	No	No	No	No	No	No
	`mask`	No	No	Partial	Partial	Partial	Partial
	`mask-box-image`	No	No	No	Experimental	No	No
	`mask-box-image-outset`				No
	`mask-box-image-repeat`
	`mask-box-image-slice`
	`mask-box-image-source`
	`mask-box-image-width`
	`mask-clip`	No	No	No	Experimental	No	No
	`mask-image`
	`mask-origin`
	`mask-position`
	`mask-repeat`
	`mask-size`
	`mask-type`			20.0	No
Compositing and Blending
compositing- 1
	`mix-blend-mode`	No	No	32.0	No	No	No
	`isolation`			36.0
	`background-blend-mode`			30.0
Filter Effects
filter- effects-1
	`filter`	No	13	35.0^{[g 53]}	18.0^{[w 33]}	No	No
	`flood-color`		No	No	No
	`flood-opacity`
	`color-interpolation-filters`
	`lighting-color`
Pointer events
SVG1.1 and earlier draft of css3-ui	`pointer-events`	11.0	12.0	1.9.2	530	No	2.0
pointer- events	`touch-action`	11.0	12.0	29.0^{[g 54]}	No	No	No
Line Grid
css-line- grid-1
	`box-snap`	No	No	No	No	No	No
	`line-grid`
	`line-slack`
	`line-snap`
		MSHTML	EdgeHTML	Gecko	WebKit	KHTML	Presto
Logical Properties
Early ideas for css- logical-1
	`block-size`	No	No	41.0^{[g 55]}	No	No	No
	`inline-size`
	`min-block-size`
	`min-inline-size`
	`max-block-size`
	`max-inline-size`
	`margin-block-start`
	`margin-block-end`
	`margin-inline-start`
	`margin-inline-end`
	`offset-block-start`
	`offset-block-end`
	`offset-inline-start`
	`offset-inline-end`
	`padding-block-start`
	`padding-block-end`
	`padding-inline-start`
	`padding-inline-end`
	`border-block-start-width`
	`border-block-end-width`
	`border-inline-start-width`
	`border-inline-end-width`
	`border-block-start-style`
	`border-block-end-style`
	`border-inline-start-style`
	`border-inline-end-style`
	`border-block-start-color`
	`border-block-end-color`
	`border-inline-start-color`
	`border-inline-end-color`
	`border-block-start`
	`border-block-end`
	`border-inline-start`
	`border-inline-end`
	`background-image-transform`			No
	`border-image-transform`			No
Will Change
css-will- change-1	`will-change`	No	No	36.0	No	No	No
CSSOM View
cssom- view	`scroll-behavior` (optional^[3])	No	No	36.0	No	No	No
Scroll Snap Points
Early ideas for css- snappoints	`scroll-snap-type`	10.0	12	39.0^{[g 56]}	No	No	No
	`scroll-snap-points-x`
	`scroll-snap-points-y`
	`scroll-snap-destination`
	`scroll-snap-coordinate`
		MSHTML	EdgeHTML	Gecko	WebKit	KHTML	Presto

MSHTML notes

margin — inherit inherits the computation and recomputes it instead of inheriting the computed value.^{[t 35]}
display — Prior to 7.0, only none, block, inline, table-header-group, and table-footer-group are fully supported. Prior to 8.0, table are not supported, while inline-block is only supported on elements that are naturally inline.
overflow — Prior to 7.0, overflow: visible; is incorrectly supported. In 8.0, scroll makes the element's height equal to its max-height even if the content isn't that tall.^{[t 36]} This has been fixed in IE9.
visibility — Prior to 8.0, visibility: collapse; is not supported. In 8.0, inline elements with visibility: visible; inside block elements with visibility: hidden; are not visible.^{[t 37]}
content — In 8.0, computed attr() values are not updated when the attribute changes.^{[t 38]}
border-color — Prior to 7.0, transparent is not supported.
border-style — Prior to 8.0, hidden is not supported.
border-style — Prior to 7.0, dotted is rendered as dashed.
box-shadow — MSHTML 9.0 renders box-shadow blur value at about half the declared value. Prior to 9.0, MSHTML supports similar functionality since 5.5 using the proprietary Shadow^{[t 39]} and DropShadow^{[t 40]} filters.
position — Prior to 7.0, fixed positioning was not supported. 7.0 and later support it in standards-compliant mode only.
z-index — Prior to 8.0, z-index is only partially supported.^{[t 41]} In 8.0, floating point values are accepted in addition to integers.^{[t 42]}
list-style-type — Prior to 8.0, armenian, decimal-leading-zero, georgian, lower-greek, lower-latin, upper-latin are not supported.
opacity — Prior to 9.0, MSHTML supported a proprietary alternative.^{[t 43]}
background-image — Prior to 8.0, background images are badly positioned in some cases.^{[t 44]}^{[t 45]}
background-attachment — Prior to 7.0, fixed was allowed on the body element only.
background-position — Prior to 8.0, fixed positioning is not supported.
font-weight — Prior to 8.0, incorrect rendering when value is 600.^{[t 46]}
text-align — In 8.0, text-align isn't inherited by :before and :after pseudo-elements.^{[t 47]}
white-space — Prior to 6.0, pre is not supported. Prior to 8.0, white-space is only partially supported; pre-line and pre-wrap are not supported.^{[t 48]}
cursor — Does not fail on non-prefixed vendor extensions.
flex — Experimental in 10.0^{[t 49]}
break-after; break-before; break-inside — Though 10.0 does support break-after, break-before, and break-inside for columns, they do not appear to support the properties "region" and "avoid-region".

Gecko notes

display — Values except inline-block and inline-table supported prior to 1.9.
z-index — Negatives values are badly supported prior to 1.9.
content — none value is unsupported prior to 1.9. This property also fails on any normal (non-pseudo-) elements, which it must support according to the CSS3 "Generated and Replaced Content Module" spec.
background-position — Versions prior to 1.7 implement the CSS2 syntax, not the proposed CSS2.1 expanded syntax.
font-size-adjust — Prior to 1.9, supported on Windows only.
font-weight — Only Regular and Bold weights get used, even if Light or Heavy/Black faces are installed, unless using DirectWrite in Gecko 2.0 on Windows 7 or Windows Vista.
white-space — pre-line is not supported prior to 1.9.1. Prior to 1.9, pre-wrap was only supported experimentally as -moz-pre-wrap.
visibility — collapse is unsupported prior to 1.8.
border-radius — Prior to 1.9.1, border curves are circular, not elliptical as specified by the current CSS3 draft. Short-cut definitions for border-radius read "tl tr br bl" instead of the W3C's "tr br bl tl". When the border style is dotted or dashed, curves are rendered as solid instead.^{[g 57]}
page-break-before; page-break-after — Only the always and auto values are supported.

WebKit notes

max-width; max-height; min-width; min-height — Are not supported on tables.(as commented on 2012-12-18, it is fixed)^{[w 34]}
font — The system font keywords that allow designers to tailor presentation to the user's operating system environment are unsupported.
font-weight — Only Regular and Bold weights get used, even if Light or Heavy/Black faces are installed.
page-break-before; page-break-after — Only the always and auto values are supported.
white-space — Prior to 522, pre-line and pre-wrap are unsupported.
visibility — collapse is unsupported prior to 522. Its implementation has the same effect as hidden and is therefore not compliant.^{[w 35]}
content — The none, open-quote, close-quote, no-open-quote, no-close-quote and normal values are unsupported. This property also fails on any normal (non-pseudo-) elements, which it must support according to the CSS3 "Generated and Replaced Content Module" spec.
font-size — The font-size property does not always accept the value 0, in "font-size: 0px" the text is still visible.

KHTML notes

overflow — Values scroll and auto are unsupported.
page-break-before; page-break-after — Before 3.5 only the always and auto values were supported.
visibility — All properties are supported, but the implementation of collapse has the same effect as hidden and is therefore not compliant.

Presto notes

counter-increment, counter-reset — Implemented the algorithm in REC CSS2.
background-position — Presto versions prior to Opera 8.0 implement the CSS2 syntax, not the proposed CSS2.1 expanded syntax.
font-weight — Incorrect rendering when value is 600. Renders the text in a compatibility mode for websites made for MSHTML.
visibility — Prior to 2.5, the value collapse was unsupported in table columns. On rows, it had the same effect as hidden and was therefore not compliant.
cursor — cursor is ignored with dynamic pseudo-classes and custom cursors are unsupported.
content — Prior to 2.7, the none value was unsupported.^{[p 6]}
font — inherit should not be allowed together with a font-size value. This should not be parsed, but it's currently done in Opera.

Descriptors

		MSHTML	EdgeHTML	Gecko	WebKit	KHTML	Presto
@counter-style
css- counter- styles- 3	`additive-symbols`	No	No	No^{[g 58]}	No	No	No
	`fallback`
	`negative`
	`pad`
	`prefix`
	`range`
	`speak-as`
	`suffix`
	`symbols`
	`system`
@font-face
css- fonts- 3	`font-family`	Yes	12	Yes	Yes	Yes	Yes
	`font-feature-settings`				Yes	Yes	Yes
	`font-stretch`				No	No	No
	`font-style`				Yes	Yes	Yes
	`font-variant`				Yes		Yes
	`font-weight`			Partial	Partial		Incorrect
	`src`			Yes	Yes		Yes
	`unicode-range`			36.0^{[g 59]}	No	No	No
@viewport
css- device- adapt-1	`height`	10.0^{[t 50]}	12	No	No	No	2.7
	`max-height`	No	No				No
	`min-height`	No	No				No
	`width`	10.0^{[t 51]}	12				2.7
	`max-width`	No	No				No
	`min-width`						No
	`zoom`						2.7
	`max-zoom`
	`min-zoom`
	`user-zoom`
	`orientation`						No

Values and units

			MSHTML	EdgeHTML	Gecko	WebKit	KHTML	Presto
Numbers^{[spec 11]}
CSS2	`<number>`	A floating-point number	3.0	12	1.0	85	Yes	1.0
	`<length>`	<number> followed by units
	`<percentage>`	<number> followed by %
	`<integer>`	An integer
css-values-3	`<angle>`	<number> angle-unit	9.0^{[t 1]}	12	Yes	Partial	Partial	Partial
	`<time>`	<number> time-unit	9.0^{[t 1]}	12	2.0^{[g 49]}	Yes	Yes	2.5
	`<frequency>`	<number> frequency-unit	No	No	No	Yes	Yes	No
	`<fraction>`	Remaining space	No	No	No	No	No	No
Strings
CSS2	`<string>`	String	3.0	12	1.0	85	Yes	1.0
CSS2	`\code`	Unicode escapes	6.0	12	1.0	85	Yes	1.0
Functions
CSS2	`rect()`	A rectangle	8.0	12	1.0	85	Yes	1.0
	`url()`	Uniform Resource Identifier	3.0	12	1.0	85	Yes	1.0
	`counter()`		8.0
	`attr()`	Attribute identifier	8.0
css-values-3	`calc()`		9.0^{[t 1]}	12	16.0^{[g 60]}	Yes^{[w 36]}	No	No
css-values-3	`toggle()`	Toggling between values	No	No	No^{[g 61]}	No	No	No
css- grid-1 ?	`repeat()`	Repeat n times	No	No	32.0^{[g 62]}	No	No	No
Colors
CSS2	HTML4 color keywords	16 predefined web colors	3.0	12	1.0	85	Yes	1.0
	`#rrggbb or #rgb`	Hexadecimal notation	3.0
	`rgb(r, g, b)`	RGB notation	4.0
	`system colors`^{[spec 12]}	28 predefined system colors	3.0
css-color-3	SVG color keywords		8.0	12	Yes	Yes	Yes	Yes
	`currentColor`	The value of the `color` property.	9.0^{[t 1]}		1.8	528	Yes	2.1
	`rgba(r, g, b, a)`	RGBA notation			1.9	525	4.0	2.2
	`hsl(h, s, l)`	HSL notation			1.5		3.5.5	2.1
	`hsla(h, s, l, a)`	HSLA notation			1.9		3.5.5	2.2
	`transparent`	Full transparency	9.0		1.9		4.0	Partial
Image values
CSS2	`<url>`	Image types	3.0	12	1.0	85	Yes	1.0
css- images-3	`<sprite>`		No	No	No	No	No	No
	`<image-list>`		No	No	No	No		No
	`<linear-gradient>`		10.0^{[t 52]}	12	16.0	Yes		Experimental
	`<radial-gradient>`
	`linear-gradient()`	Color gradients
	`radial-gradient()`
	`repeating-linear-gradient()`
	`repeating-radial-gradient()`
css- images-4	`conic-gradient()`		No	No	No	No	No	No
	`repeating-conic-gradient()`		No	No	No	No	No	No
	`element()`	Reproduce element	No	No	Experimental	No	No	No
	`cross-fade()`	Transitioning between images	No	No	No^{[g 63]}	No	No	No
	`image-set()`	Resolution negotiation	No	No	No	No	No	No
Counter Styles^{[spec 13]}
css- counter- styles-3	`symbols()`	Anonymous Counter Styles	No	No	No	No	No	No
Keywords
CSS2	`auto`	Automatically calculated	6.0	12	1.0	85	Yes	1.0
CSS2	`inherit`	Inherited from the parent	8.0	12	1.0	85	Yes	1.0
css-values-3	`initial`		No	13	19.0	125	No	No
Units
CSS2	`px`	Pixel	3.0	12	1.0	85	Yes	1.0
	`pt`	Point
	`pc`	Pica
	`cm`	Centimetre
	`mm`	Millimetre
	`in`	inch
	`em`	em
	`ex`	ex
	`%`	Percentage
css-values-3	`deg`	Degree	9.0^{[t 1]}	12	1.9.1	Yes	Yes	2.5
	`grad`	Grad
	`rad`	Radian
	`turn`	turn			13.0^{[g 64]}	No	No	No
	`ms`	Millisecond			2.0^{[g 65]}	Yes	Yes	2.5
	`s`	Second			2.0^{[g 65]}			2.5
	`Hz`	Hertz	No	No	No			No
	`kHz`	Kilohertz		No	No			No
	`dpi`	Dots per inch		12	1.9.1	No	4.1	2.5
	`dpcm`	Dots per centimetre			1.9.1	No	4.1	2.5
	`dppx`	Dots per pixel-unit			16.0	No	?	No
earlier draft of css-line- grid-1	`gd`	Cells in the layout-grid		No	No	No	No	No
unit being considered for css- template- 3	`fr`	Remaining space in a series of length values		12	No	No	No	No
css-values-3	`rem`	the font size of the root element	9.0^{[t 1]}		1.9.2	Yes	No	2.10.229^{[p 7]}
	`vw`	the viewport's width			19.0^{[g 3]}	28.0^{[w 37]}	No	No
	`vh`	the viewport's height
	`vmin`	equal to the smaller of ‘vw’ or ‘vh’.	No
	`vmax`	equal to the larger of ‘vw’ or ‘vh’.	No
	`ch`	the width of the "0" (ZERO, U+0030) glyph found in the font for the font size used to render.	No		1.9.1	No	No	No
Filter Effects
filter- effects
	`grayscale()`		No	13	35.0^{[g 66]}	18.0^{[w 38]}	No	No
	`sepia()`
	`saturate()`
	`hue-rotate()`
	`invert()`
	`opacity()`
	`brightness()`
	`contrast()`
	`blur()`
	`drop-shadow()`
	Variables
css- variables- 1
	`--*`	define variable	No	No	31.0^{[g 67]}	No	No
	`var(--*)`	use variable	No	No	31.0^{[g 67]}	No	No
			MSHTML	EdgeHTML	Gecko	WebKit	KHTML	Presto

General notes

transparent —
CSS1 introduced the ‘transparent’ value for the background-color property. CSS2 allowed border-color to also accept the ‘transparent’ value. The Open eBook(tm) Publication Structure 1.0.1 [OEB101] extended the ‘color’ property to also accept the ‘transparent’ keyword. CSS3 extends the color value to include the ‘transparent’ keyword to allow its use with all properties that accept a <color> value. This simplifies the definition of those properties in CSS3.
<angle> — The turn unit is unsupported.

MSHTML notes

rect() — Prior to 8.0, rect() was not supported with the correct syntax using commas.
auto — In quirks mode (IE5 emulation mode), auto does not work for margins, except table elements.
transparent — In 7.0 and 8.0, using transparent in the color property will render the text as black.
transparent — Prior to 7.0, transparent is not supported on borders (shows as solid black) and is ignored on PNG images.

Gecko notes

<ch> — Prior to version 1.9.1, used the width of the "M" glyph instead of the width of the "0" glyph.^{[g 68]}

Presto notes

<number> — Prior to 2.1, there existed a quantization error for values greater than 20.47 (not limited to em, try any non-pixel units).^{[p 8]}
transparent — Keyword is ignored when used with the outline-color property. Prior to version 2.2, it was also ignored when used with the color and text-shadow properties.

References

↑ Mackie, Kurt (10 December 2018). "Microsoft Edge Browser To Get New Rendering Engine but EdgeHTML Continues". https://redmondmag.com/articles/2018/12/10/edgehtml-continues.aspx. Retrieved 21 December 2019.
↑ MDN: Web technology for developers: font kerning
↑ The cssom-view specification of this property says that “[u]ser agents may ignore this property.”

Specifications

MSHTML

Gecko

Webkit

Presto

↑ An introduction to meta viewport and @viewport, dev.Opera, http://dev.opera.com/articles/view/an-introduction-to-meta-viewport-and-viewport/
↑ Storey, David (2010-11-23). "First browser to 11 (unless Chrome gets there first)". Opera. http://my.opera.com/ODIN/blog/first-browser-to-11-unless-chrome-gets-there-first.
↑ Haavard (2010-08-09), New 10.70 snapshot with more Presto updates, Opera, http://my.opera.com/desktopteam/blog/2010/08/09/new-10-70-snapshot-with-more-presto-updates
↑ Haavard (2010-08-03), Presto update for Opera 10.70, Opera, http://my.opera.com/desktopteam/blog/2010/08/03/presto-update
↑ "CSS Multi-column Layout Module support in Opera Presto 2.8". Opera. 2011-03-06. http://www.opera.com/docs/specs/presto28/css/multicolumnlayout/.
↑ Koch, Peter-Paul, before/:after and content, Quirksmode, http://www.quirksmode.org/css/beforeafter_content.html
↑ Lawson, Bruce (2011-12-06). "Hello Opera 11.60!". Opera. http://my.opera.com/ODIN/blog/2011/12/06/hello-opera-11-60.
↑ Quantization error for em values in Opera 7–9.2, http://www.brunildo.org/test/emarg.pl

0.00

(0 votes)

[1] Mackie, Kurt (10 December 2018). "Microsoft Edge Browser To Get New Rendering Engine but EdgeHTML Continues". https://redmondmag.com/articles/2018/12/10/edgehtml-continues.aspx. Retrieved 21 December 2019.

[71] MDN: Web technology for developers: font kerning

[140] The cssom-view specification of this property says that “[u]ser agents may ignore this property.”

[2] Cascading Style Sheets, level 1, W3C, https://www.w3.org/TR/CSS1/

[3] Cascading Style Sheets Level 2 Revision 1 (CSS 2.1) Specification, W3C, https://www.w3.org/TR/CSS2/

[14] CSS Paged Media Module Level 3 - Margin Boxes, W3C, https://www.w3.org/TR/css-page-3/#margin-boxes

[17] Selectors Level 3, W3C, 30 January 2018, https://www.w3.org/TR/selectors-3/

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[6] @supports - CSS, MDN, https://developer.mozilla.org/en-US/docs/Web/CSS/@supports

[8] Bug 966166 - Implement @counter-style rule, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=966166

[moz-page-12] 3.0 ^3.1 "What's New", Firefox 19 Release Notes (Mozilla), https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/19.0/releasenotes/

[18] Bug 418039 - CSS parent (has-child) and ancestor (has-descendant) selectors (:subject), Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=418039

[19] Bug 813187 - Support CSS 2.1 @page Page Selectors, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=813187

[27] Bug 506554 - Implement the CSS3 pseudo-classes :required and :optional, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=506554

[30] Bug 312971 - Support :read-only and :read-write pseudoclasses, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=312971

[31] Bug 561154 - fix specificity of :-moz-any(), Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=561154

[32] Bug 562169 - Implement the :dir(rtl/ltr) selector to select on HTML directionality, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=562169

[33] Bug 843579 - Remove prefix from :any-link pseudo-class, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=843579

[34] Bug 648722 - Add support for :scope as :-moz-scope, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=648722

[41] Bug 237119 - property 'display' is ignored for generated content, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=237119

[44] Bug 842329 - [css3-cascade implement the 'all' shorthand], Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=842329

[46] Bug 451134 - change -moz-border-radius* properties to css3-background names, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=451134

[48] Bug 378217 - implement css3 'border-image' property, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=378217

[49] Bug 497995 - Implement border-image revisions in latest css3-background, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=497995

[51] Bug 590039 - fix blur radius computation and rename -moz-box-shadow to box-shadow, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=590039

[52] Bug 470547 - Spread (4th length) for text-shadow not supported, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=470547

[54] Bug 613659 - implement box-decoration-break: Left/right part of a box-shadow should only be drawn on the first/last continuation of an inline box, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=613659

[62] Bug 549809 - Rename background-origin and background-clip properties and values to match css3-background, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=549809

[68] Bug 3512 - (font-stretch) Implement font-stretch property, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=3512

[72] Bug 549861 - (font-variant) implement parsing of font feature properties, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=font-variant

[75] Bug 475891 - (unicode-range) implement unicode-range support in user font set, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=unicode-range

[76] Bug 249159 - implement 'word-break' properties of CSS3, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=249159

[78] hyphens - MDN Docs, Mozilla, https://developer.mozilla.org/en/CSS/hyphens (Only English)

[79] Bug 587438 - word-wrap, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=587438

[80] Bug 536557 - Implement CSS3 text-align-last, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=536557

[82] Bug 276079 - Implement text-justify property(but 'auto', 'inter-word', 'inter-ideograph' and 'distribute' only), Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=276079

[88] Bug 59109 - implement CSS3 text module's text-decoration-style and text-decoration-color, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=59109

[89] Firefox 6 for developers, Mozilla, https://developer.mozilla.org/en/Firefox_6_for_developers, retrieved 2011-04-24

[92] Bug 145503 - (writing-mode) CSS3 writing-mode (vertical text), Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=145503

[95] Implement 'box-sizing', Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=243412

[97] Bug 553576 - Implement css resize property behaviour, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=553576

[98] Bug 312156 - implement text-overflow: ellipsis from CSS3 text, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=312156

[100] Bug 132035 - Implement missing page-break-* CSS2.1 features, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=132035

[101] Bug 137367 - Implement orphans and widows, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=137367

[102] Bug 851937 - Support for @page size, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=851937

[104] Bug 825771 - [css3-images implement 'image-orientation' property], Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=825771

[105] Bug 624647 - [css3-images Implement object-fit and object-position CSS properties], Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=624647

[107] Bug 47159 - Support css3-speech (previously Aural Style Sheet) properties in getComputedStyle, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=47159

[110] Bug 256274 - Implement CSS ruby module, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=256274

[moz-multicol-112] Bug 684062 - Compare spec and implement CSS multi-column support, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=684062

[114] Bug 446569 - Implement CSS3 columns shorthand, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=446569

[115] Bug 549114 - Support Column Breaks, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=549114

[118] Bug 695222 - Implement column-fill, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=695222

[119] Bug 616436 - column-span not implemented (css3 multicolumn), Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=616436

[121] Bug 616605 - CSS Grid Layout, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=616605

[126] Bug 435442 - Implement Webkit's CSS Animation proposal, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=435442

[moz-trans-129] 49.0 ^49.1 Bug 435441 - get CSS transitions complete enough to ship, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=537142

[moz-flexbox-130] Bug 783409 - Turn on CSS flexbox in builds by default (by enabling pref, build flag, etc), Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=783409

[133] Bug 674802 - implement CSS3 Regions, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=674802

[135] Bug 674804 - implement CSS3 Exclusions, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=674804

[136] Bug 1057180 - Turn on CSS Filters by default (by enabling about:config pref), Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=1057180

[138] Bug 795567 - Implement touch-action CSS property for Pointer Events, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=795567

[139] Bug 1138384 - (enable-writing-mode-release) enable CSS writing-mode support in release channels, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=1138384

[141] Bug 945584 - Implement CSS scroll snapping, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=945584

[157] Bug 382721 - Dotted/dashed -moz-border-radiused corners are rendered as solid, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=382721

[161] Bug 843718 - (css-counter-styles-3) Implement CSS Counter Styles Level 3, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=843718

[162] Bug 475891 - (unicode-range) implement unicode-range support in user font set, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=unicode-range

[166] Bug 363249 - implement css3-values calc(), Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=363249

[168] Bug 363250 - implement toggle() expression, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=363250

[169] Bug 978478 - Support repeat() in CSS Grid templates, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=978478

[172] Bug 546052 - Support CSS transitions with background-image images (cross-fading), Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=546052

[174] Bug 716628 - Support "turn" unit from CSS3 Values and Units, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=716628

[175] Bug 435441 - Implement Webkit's CSS Transitions proposal, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=435441

[178] Bug 1057180 - Turn on CSS Filters by default (by enabling about:config pref), Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=1057180

[180] Bug 773296 - CSS Variables, Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=773296

[181] Bug 282126 - What to do about the 'ch' length unit? (Mozilla vendor specific), Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=282126

[7] @supports - CSS, MDN, https://developer.mozilla.org/en-US/docs/Web/CSS/@supports

[10] Bug 747754 - [CSS-WD implement CSS Device Adaptation], Mozilla, https://bugzilla.mozilla.org/show_bug.cgi?id=747754

[13] Bug 35329 - Enhance CSS parser for Paged Media (Iteration 1), WebKit, https://bugs.webkit.org/show_bug.cgi?id=35329

[15] Bug 85062 - Support CSS 3 Paged Media Margin Boxes, WebKit, https://bugs.webkit.org/show_bug.cgi?id=85062

[20] Bug 38731 - Make CSS Parser properly handle only-for-pages pseudo-classes, WebKit, https://bugs.webkit.org/show_bug.cgi?id=38731

[21] Bug 27458 - Support :default HTML5 CSS selector, Webkit, https://bugs.webkit.org/show_bug.cgi?id=27458

[23] Bug 27357 - Support :valid/:invalid CSS selectors, Webkit, https://bugs.webkit.org/show_bug.cgi?id=27357

[25] Bug 29071 - Support for :in-range and :out-of-range CSS selectors, Webkit, https://bugs.webkit.org/show_bug.cgi?id=29071

[28] Bug 25551 - Support for HTML5 Forms "required" attribute, Webkit, https://bugs.webkit.org/show_bug.cgi?id=25551

[42] Bug 3409 - CSS1: Safari ignores "text-transform" attribute in "first-line" CSS rules, Webkit, https://bugs.webkit.org/show_bug.cgi?id=3409

[43] Bug 23209 - [RFE] CSS Generated Content does not transition, Webkit, https://bugs.webkit.org/show_bug.cgi?id=23209

[47] Bug 27578 - Drop the prefix from the border-radius properties, Webkit, https://bugs.webkit.org/show_bug.cgi?id=27578

[53] Bug 51448 - Support unprefixed box-shadow property, WebKit, https://bugs.webkit.org/show_bug.cgi?id=51448

[55] Bug 27576 - [CSS3 Backgrounds and Borders] Implement box-decoration-break, WebKit, https://bugs.webkit.org/show_bug.cgi?id=27576

[59] Bug 3234 - CSS2: Implement better quote support (for the q tag), Webkit, https://bugs.webkit.org/show_bug.cgi?id=3234

[63] Bug 27562 - Drop the prefixes from background-clip and background-origin, WebKit, https://bugs.webkit.org/show_bug.cgi?id=27562

[64] [CSS3 Backgrounds and Borders] Drop the prefix from background-size, WebKit, https://bugs.webkit.org/show_bug.cgi?id=27575

[67] Bug 15257 - Support CSS 3 font-size-adjust, Webkit, https://bugs.webkit.org/show_bug.cgi?id=15257

[69] Bug 12530 - CSS3: Support the font-stretch property, Webkit, https://bugs.webkit.org/show_bug.cgi?id=12530

[73] Bug 63796 - Master: Support CSS3 font feature properties, Webkit, https://bugs.webkit.org/show_bug.cgi?id=63796

[81] Bug 76173 - CSS3: text-align-last on webkit, Webkit, https://bugs.webkit.org/show_bug.cgi?id=76173

[83] Bug 18109 - Implement hanging punctuation, Webkit, https://bugs.webkit.org/show_bug.cgi?id=18109

[90] Bug 58491 - [css3-text] Support text-decoration-* properties from CSS3 Text, Webkit, https://bugs.webkit.org/show_bug.cgi?id=58491

[93] Bug 46123 - Implement writing-mode support for all of layout (master bug), WebKit, https://bugs.webkit.org/show_bug.cgi?id=46123

[96] Bug 36713 - Support box-sizing without the vendor prefix, WebKit, https://bugs.webkit.org/show_bug.cgi?id=36713

[103] Bug 10894 - CSS "size" property is not supported, Webkit, https://bugs.webkit.org/show_bug.cgi?id=10894

[108] Bug 46827 - AX: implement CSS3 Speech "speak", WebKit, https://bugs.webkit.org/show_bug.cgi?id=46827

[116] Bug 15552 - Support CSS3 column-break-before and column-break-after, WebKit, https://bugs.webkit.org/show_bug.cgi?id=15552

[117] Bug 39498 - [CSS3 Multi-column] Floating elements are rendered below the columns, WebKit, https://bugs.webkit.org/show_bug.cgi?id=39498#c7

[120] Bug 15550 - WebKit does not support CSS3 column-span, Webkit, https://bugs.webkit.org/show_bug.cgi?id=15550

[122] Bug 60731 - Implement CSS3 Grid Layout (master bug), Webkit, https://bugs.webkit.org/show_bug.cgi?id=60731

[131] flex - CSS, MDN, https://developer.mozilla.org/en-US/docs/Web/CSS/flex

[137] filter - CSS, MDN, https://developer.mozilla.org/en-US/docs/Web/CSS/filter

[158] Bug 25016 - max-width and max-height are not overriding the width and height properties when 'display' set to 'table', Webkit, https://bugs.webkit.org/show_bug.cgi?id=25016

[159] Bug 8735 - CSS 2.1 visibility: collapse rendered as visibility: hidden, Webkit, https://bugs.webkit.org/show_bug.cgi?id=8735

[167] Bug 16662 - CSS3: Implement calc(), Webkit, https://bugs.webkit.org/show_bug.cgi?id=16662

[177] Can I use Viewport units, Can I Use, http://caniuse.com/viewport-units

[179] filter - CSS, MDN, https://developer.mozilla.org/en-US/docs/Web/CSS/filter

[11] An introduction to meta viewport and @viewport, dev.Opera, http://dev.opera.com/articles/view/an-introduction-to-meta-viewport-and-viewport/

[56] Storey, David (2010-11-23). "First browser to 11 (unless Chrome gets there first)". Opera. http://my.opera.com/ODIN/blog/first-browser-to-11-unless-chrome-gets-there-first.

[99] Haavard (2010-08-09), New 10.70 snapshot with more Presto updates, Opera, http://my.opera.com/desktopteam/blog/2010/08/09/new-10-70-snapshot-with-more-presto-updates

[106] Haavard (2010-08-03), Presto update for Opera 10.70, Opera, http://my.opera.com/desktopteam/blog/2010/08/03/presto-update

[113] "CSS Multi-column Layout Module support in Opera Presto 2.8". Opera. 2011-03-06. http://www.opera.com/docs/specs/presto28/css/multicolumnlayout/.

[160] Koch, Peter-Paul, before/:after and content, Quirksmode, http://www.quirksmode.org/css/beforeafter_content.html

[176] Lawson, Bruce (2011-12-06). "Hello Opera 11.60!". Opera. http://my.opera.com/ODIN/blog/2011/12/06/hello-opera-11-60.

[182] Quantization error for em values in Opera 7–9.2, http://www.brunildo.org/test/emarg.pl

[1]

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[g 25]

[g 26]

[g 27]

[w 21]

[g 28]

[w 22]

[t 20]

[t 21]

[t 22]

[t 23]

[g 29]

[g 30]

[w 23]

[t 24]

[g 31]

[w 24]

[t 25]

[g 32]

[w 25]

[g 33]

[g 34]

[p 3]

[g 35]

v t e Browser engines
Active	Blink EdgeHTML Gecko Goanna NetSurf Servo WebKit
Discontinued	KHTML Mariner Presto Tasman Tkhtml Trident
Comparisons	General info Support HTML CSS graphics typography

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