Android System WebView is an essential part of the Android OS that lets apps display web content without starting a separate web browser app.

How to avoid WebView trouble on older Android devices Google has stopped providing pre-KitKat patches for Android's built-in Web browser, but that doesn't mean you're left wide open to attacks.

The default behavior in this instance will be for the Chrome APK on your device to render Android System WebViews. Google says this is more memory-efficient than using the current WebView.

Android 4.4 and 5.0, which use Blink rather than WebKit for their WebView, are unaffected. But by Google's own numbers, some 60 percent of Android users are using 4.3 or below.