CSS -moz-outline-radius-topleft Property Reference

The CSS -moz-outline-radius-topleft property is a nonstandard property in Mozilla Extensions. Review its formal syntax, computed behavior, and practical declarations.

Updated 2026-08-12

-moz-outline-radius-topleft overview

The CSS -moz-outline-radius-topleft property is a nonstandard property in Mozilla Extensions. Review its formal syntax, computed behavior, and practical declarations.

The property is not inherited by default. Use an explicit global keyword when inheritance is intended.

Syntax and formal definition

-moz-outline-radius-topleft formal syntax

Field	Value
Formal syntax	<outline-radius>
Initial value	0
Applies to	allElements
Inherited	No
Percentages	referToDimensionOfBorderBox
Computed value	asSpecified
Animation type	lpc
Media	visual
Specification group	Mozilla Extensions
Status	Nonstandard

Practical examples

These declarations demonstrate valid ways to set -moz-outline-radius-topleft. The initial and inherit global keywords remain available even when a property-specific value is preferable.

-moz-outline-radius-topleft live example

CSS

.reset-example {
  -moz-outline-radius-topleft: initial;
}

.inherit-example {
  -moz-outline-radius-topleft: inherit;
}

@supports (-moz-outline-radius-topleft: initial) {
  .supported {
    -moz-outline-radius-topleft: initial;
  }
}