The source for learning NetBeans.
In NetBeans 6.8, it looks like there are tentative plans to implement an embedded web browser or web preview directly inside NetBeans.
The concept is to minimize the amount of time the user spends switching between the IDE and external web browser. Hopefully, it will work more like a WYSIWYG preview feature (think Dreamweaver style) and not a thick or heavy web browser. I know I’ve hoped for years to have a web preview option directly in NB. Hopefully this addresses some of that need.
You can follow the plans at the NetBeans Wiki at this location http://wiki.netbeans.org/EmbeddedBrowserPlan68.