Firefox 54 has added the support for the CSS
appearance property along with
-webkit-appearance as an alias for WebKit/Blink compatibility. Meanwhile, the non-standard, Firefox-specific
-moz-appearance property is no longer available to web content.
-webkit-appearance:none work in the same way as
-moz-appearance:none, which turns off the native theme for elements. The initial value is
Update: This change has been planned for Firefox 54 but postponed.