Stylesheet removes some browser prefixes on save

[fdgfdgfdg]

When I try to save these css attributes they are remove from the stylesheet.

-moz-transition: background-color 500ms ease-out 1s;
-o-transition: background-color 500ms ease-out 1s;

Is there any reason for that?

transition | CSS-Tricks

[Teodor]

Well it depends what have you selected in Wappler CSS autoprefeixer options for older browsers support.

[fdgfdgfdg]

I set to all browsers instead of last two, thanks