After updating to SWT 3.129.0 or later, the sidebar is loaded in the internal browser using Internet Explorer (IE), but the sidebar is not IE-compatible. The reason is the use of SWT.DEFAULT as the style in the Browser constructor. The SWT.DEFAULT is not a valid style for the Browser widget. This should be changed to SWT.NONE or SWT.EDGE instead of SWT.DEFAULT.
Steps to reproduce:
Clone the acrolinx-sidebar-demo-java.
Update SWT to version 3.129.0.
Run the SWT demo.
Check the sidebar.