swt browser in headless mode

Hi,

I have problem running swt browser (mozilla) in headless mode. The
code is quite simple, just initialize the browser, attach
WebProgressListner and open url.
My environment is ubuntu server + xorg + tinghtvnc. This configuration
works fine up to the moment I close/disconnect the vnc client. Then
browser freeze and I stop receive events from browser.

Next time I open vnc client the browser continue from where it was
frozen.

Any ideas how to fix this issue.

thanks