Free Browser Compatibility Testing on Mozilla Firefox 56 Browser

ELEMENTS NOT SUPPORTED IN FIREFOX 56 BROWSER

CSS line-clamp

Proprietary and undocumented CSS property that will contain text to a given amount of lines when used in combination with display: -webkit-box. It will end with ellipsis when text-overflow: ellipsis is included.

Media Queries: interaction media features

Allows a media query to be set based on the presence and accuracy of the user's pointing device, and whether they have the ability to hover over elements on the page. This includes the pointer, any-pointer, hover, and any-hover media features.

CSS Conical Gradients

Method of defining a conical or repeating conical color gradient as a CSS image.

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.

CSS widows & orphans

CSS properties to control when lines break across pages or columns by defining the amount of lines that must be left before or after the break.

CSS ::marker pseudo-element

The ::marker pseudo-element allows list item markers to be styled or have their content value customized.

inputmode attribute

The inputmode attribute specifies what kind of input mechanism would be most helpful for users entering content into the form control.

Dialog element

Method of easily creating custom dialog boxes to display to the user with modal or non-modal options. Also includes a ::backdrop pseudo-element for behind the element.

HTML Media Capture

Facilitates user access to a device's media capture mechanism, such as a camera, or microphone, from within a file upload control.

Web App Manifest

The web app manifest provides information about an application (such as name, author, icon, and description) in a JSON file, which browsers can use to give richer offline experiences.