In browsersim properties, GTK2 is the default - and if a RHEL6 user uses Java 1.7 JDK or Java 1.8 on RHEL6 - browsersim seems to function correctly.

But - is a user attempts to configure GTK3 (with either Oracle 1.7 or 1.8) - in the browsersim properties, browsersim fails to open with this error:

"To use BrowserSim please install webkitgtk 1.2.0 or higher or run BrowserSim with Oracle Java 7u7 and higher."
Also see <a href="http://tools.jboss.org/documentation/faq/browsersim.html">BrowserSim FAQ</a>.
Stack trace:
org.eclipse.swt.SWTError: To use BrowserSim please install webkitgtk 1.2.0 or higher or run BrowserSim with Oracle Java 7u7 and higher.
at org.jbos

The error is displayed even though this package is installed:
webkitgtk-1.2.6-5.el6.x86_64