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ELEMENTS NOT SUPPORTED IN MOZILLA Firefox 41 BROWSER

text-emphasis styling

Method of using small symbols next to each glyph to emphasize a run of text, commonly used in East Asian languages. The text-emphasis shorthand, and its text-emphasis-style and text-emphasis-color longhands, can be used to apply marks to the text. The text-emphasis-position property, which inherits separately, allows setting the emphasis marks' position with respect to the text.

Object.values method

The Object.values() method returns an array of a given object's own enumerable property values.

seamless attribute for iframes

The seamless attribute makes an iframe's contents actually part of a page, and adopts the styles from its hosting page. The attribute has been removed from both the WHATWG and the W3C HTML5 specifications.

system-ui value for font-family

Value for font-family that represents the default user interface font.

CSS revert value

A CSS keyword value that resets a property's value to the default specified by the browser in its UA stylesheet, as if the webpage had not included any CSS. For example, display:revert on a

would result in display:block. This is in contrast to the initial value, which is simply defined on a per-property basis, and for display would be inline. moved from both the WHATWG and the W3C HTML5 specifications.

CSS touch-action property

touch-action is a CSS property that controls filtering of gesture events, providing developers with a declarative mechanism to selectively disable touch scrolling (in one or both axes) or double-tap-zooming.

CSS color-adjust

The color-adjust (or -webkit-print-color-adjust as prefixed in WebKit/Blink browsers) property is a non-standard CSS extension that can be used to force printing of background colors and images.

CSS background-repeat round and space

Allows CSS background images to be repeated without clipping.

CSS text-size-adjust

On mobile devices, the text-size-adjust CSS property allows Web authors to control if and how the text-inflating algorithm is applied to the textual content of the element it is applied to.

Font unicode-range subsetting

This @font-face descriptor defines the set of Unicode codepoints that may be supported by the font face for which it is declared. The descriptor value is a comma-delimited list of Unicode range () values. The union of these ranges defines the set of codepoints that serves as a hint for user agents when deciding whether or not to download a font resource for a given text run.