If you go to a web page with many images, JavaFx WebView uses way too much heap to load the web page.

For example, this particular web page has 340 images:

https://github.com/d3/d3/wiki/Gallery

JavaFx WebView takes around 6.7 GB of heap in order to render the page.
Firefox takes around 500 MB.

Here are some example heap overflow stacks if you only set you heaps to 2 GB or so:

{code}
Exception in thread "JavaFX Application Thread" java.lang.OutOfMemoryError: Java heap space
        at com.sun.javafx.iio.gif.GIFImageLoader2.decodePalette(GIFImageLoader2.java:323)
        at com.sun.javafx.iio.gif.GIFImageLoader2.load(GIFImageLoader2.java:234)
        at com.sun.javafx.iio.ImageStorage.loadAll(ImageStorage.java:364)
        at com.sun.javafx.iio.ImageStorage.loadAll(ImageStorage.java:274)
        at com.sun.javafx.webkit.prism.WCImageDecoderImpl.loadFrames(WCImageDecoderImpl.java:173)
        at com.sun.javafx.webkit.prism.WCImageDecoderImpl.loadFrames(WCImageDecoderImpl.java:186)
        at com.sun.javafx.webkit.prism.WCImageDecoderImpl.addImageData(WCImageDecoderImpl.java:109)
        at com.sun.webkit.network.URLLoader.twkDidFinishLoading(Native Method)
        at com.sun.webkit.network.URLLoader.notifyDidFinishLoading(URLLoader.java:838)
        at com.sun.webkit.network.URLLoader.lambda$didFinishLoading$98(URLLoader.java:829)
        at com.sun.webkit.network.URLLoader$$Lambda$314/1527838714.run(Unknown Source)
        at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)
        at com.sun.javafx.application.PlatformImpl$$Lambda$179/203274438.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
        at com.sun.javafx.application.PlatformImpl$$Lambda$178/1044483803.run(Unknown Source)
        at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
        at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
        at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
        at com.sun.glass.ui.win.WinApplication$$Lambda$167/1747735167.run(Unknown Source)
        at java.lang.Thread.run(Thread.java:745)
{code}