mozborderbottomleftradius

Mozborderbottomleftradius is a non-standard, Mozilla-specific CSS property used in older versions of Mozilla-derived browsers to control the radius of the bottom-left corner of an element’s border. It is part of the early -moz-border-radius extensions that preceded the standard CSS3 border-radius syntax.

Historically, mozborderbottomleftradius (and related -moz-border-... properties) allowed web authors to specify corner radii before the CSS3 standard was finalized. These prefixed properties were implemented to provide the same visual effect as later standard properties, but they were not part of the official CSS specification and varied in exact behavior across browser versions. As CSS3 matured, the standard border-bottom-left-radius property and the shorthand border-radius became the universal, cross-browser approach.

In practice, mozborderbottomleftradius accepted values representing the radius for the bottom-left corner, using lengths or percentages, similar to the modern equivalent. Developers who maintained older sites might have used it in conjunction with other -moz-border-... properties to achieve rounded corners in Firefox/Netscape at the time. Today, these properties are obsolete and ignored by modern browsers.

Best practice is to use the standard CSS border-bottom-left-radius property (and the general border-radius shorthand) for compatibility with current browsers. If working with legacy code, mozborderbottomleftradius may be found, but it should be replaced with standard CSS to ensure consistent rendering across environments. See also CSS border-radius, vendor prefixes, and cross-browser compatibility notes.