Autoprefixer

Write your CSS rules without vendor prefixes (in fact, forget about them entirely):

div {
    display: flex
}

Autoprefixer will use the data based on current browser popularity and property support to apply prefixes for you.

div {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex
}

Change Autoprefixer Browsers

Go to Project Settings -> Other Settings -> Autoprefixer to change list of browsers that you want to support.

Browser Config Format

You can specify the versions by queries (case insensitive):

• last 2 versions: the last 2 versions for each major browser.
• last 2 Chrome versions: the last 2 versions of Chrome browser.
• > 5%: versions selected by global usage statistics.
• > 5% in US: uses USA usage statistics. It accepts two-letter country code.
• ie 6-8: selects an inclusive range of versions.
• Firefox > 20: versions of Firefox newer than 20.
• Firefox >= 20: versions of Firefox newer than or equal to 20.
• Firefox < 20: versions of Firefox less than 20.
• Firefox <= 20: versions of Firefox less than or equal to 20.
• Firefox ESR: the latest [Firefox ESR] version.
• iOS 7: the iOS browser version 7 directly.
• not ie <= 8: exclude browsers selected before by previous queries. You can add not to any query.

All queries are based on the Can I Use support table, e.g. last 3 iOS versions might select 8.4, 9.2, 9.3 (mixed major & minor), whereas last 3 Chrome versions might select 50, 49, 48 (major only).

Browsers

• Chrome for Google Chrome.
• Firefox or ff for Mozilla Firefox.
• Explorer or ie for Internet Explorer.
• Edge for Microsoft Edge.
• iOS or ios_saf for iOS Safari.
• Opera for Opera.
• Safari for desktop Safari.
• ExplorerMobile or ie_mob for Internet Explorer Mobile.
• Android for Android WebView.
• BlackBerry or bb for Blackberry browser.
• ChromeAndroid or and_chr for Chrome for Android (in Other section, because mostly same as common Chrome).
• FirefoxAndroid or and_ff for Firefox for Android.
• OperaMobile or op_mob for Opera Mobile.
• OperaMini or op_mini for Opera Mini.
• Samsung for Samsung Internet.
• UCAndroid or and_uc for UC Browser for Android.