📃 December 2020 release notes
New in Firefox
The following features are now available in Firefox:
-
:not():
The
:not()functional pseudo-class matches elements that do not match the selectors in its argument.
New in Firefox for Android
The following features are now available in Firefox for Android:
-
:not():
The
:not()functional pseudo-class matches elements that do not match the selectors in its argument.