Microformats (sometimes abbreviated μF) are simple conventions used to embed semantics in HTML and quickly provide an API to be used by search engines, aggregators, and other tools. These small patterns of HTML are used for marking entities that range from fundamental to domain-specific information, such as people, organizations, events, and locations.
The EncryptedMediaExtenstions API provides interfaces for controlling the playback of content which is subject to a digital restrictions management scheme.
The@viewportCSSat-rule contains a set of nested descriptors in a CSS block that is delimited by curly braces. These descriptors control viewport settings, primarily on mobile devices.
-moz-force-broken-image-icon is an extended CSS property. The value 1 forces a broken image icon even if the image has an alt attribute. When the value 0 is used the image will act as usual and only display the alt attribute.