Modify the eclipse.ini configuration file in eclipse and add the following lines of code at the end:
-Dorg.eclipse.swt.browser.DefaultType=mozilla
-Dorg.eclipse.swt.browser.UseWebKitGTK = true
-Dorg.eclipse.swt.browser.XULRunnerPath==/usr/lib/xulrunner-2
-Dorg.eclipse.swt.internal.gtk.cairoGraphics=false