I use the SWT Browser control in my Eclipse RCP application. On Linux Ubuntu 10.10 this depends on the user having installed xulrunner-1.9.2. This works fine.
Howeve
For Eclipse Juno SR1 (4.2 SR1) running on Ubuntu 12.04, the following worked for me:
sudo apt-get install libwebkitgtk-3.0-0
sudo apt-get install libswt-webkit-gtk-3-jni
Set the DefaultType and UseWebKitGTK properties (I did it by adding the following to my eclipse.ini file):
-Dorg.eclipse.swt.browser.DefaultType=webkit
-Dorg.eclipse.swt.browser.UseWebKitGTK=true