Native browser for GTK on linux

Having support for the internal browser is often not working out of the box on linux. You can check the status by opening your Preferences/General/Web Browser settings. If the radio button Use internal  web browser is enabled (not necessarily activated) internal browser support is working, otherwise not.

Most annoyingly without internal browser support help hovers in your text editors use a fallback mode not rendering links or images.

To solve this issue you may first check the SWT FAQ. For me working on gentoo linux the following command fixed the problem:

emerge net-libs/webkit-gtk:2

It is important to not only install the latest version of webkit-gtk which will not be recognized by Eclipse. After installation restart eclipse and your browser should work. Verified on Eclipse Neon.