CSS

css vendor prefixes

-webkit- (Chrome, Safari, newer versions of Opera, almost all iOS browsers including Firefox for iOS; basically, any WebKit based browser)
-moz- (Firefox)
-o- (old pre-WebKit versions of Opera)
-ms- (Internet Explorer and Microsoft Edge)

css browser prefixes

Android: -webkit-
Chrome: -webkit-
Firefox: -moz-
Internet Explorer: -ms-
iOS: -webkit-
Opera: -o-
Safari: -webkit-

prefix in css

/* The point of "vendor prefixes" was to allow browser makers 
to start supporting experimental CSS declarations. */

/* -webkit => Chrome, Safari */
/* -moz => Firefox */
/* -o => Opera */
/* -ms => Internet Explorer */

/* example  */
.elementClass {
    -moz-border-radius: 2em;
    -ms-border-radius: 2em;
    -o-border-radius: 2em;
    -webkit-border-radius: 2em;
    border-radius: 2em;
}