I’ve updated my Oracle Map with new information about Forms 12c. As you might have noticed, we got Forms 12c in October 2015, so we have support until at least 2023.
An important new feature in Forms 12c is the ability to deploy stand-alone (through Java Web Start) without a browser. This is necessary because browser vendors are desupporting the NSAPI interface that the Java plug-in depends on. You already can’t run Forms in Google Chrome, and Firefox will stop supporting NSAPI end of 2016. The new Microsoft browser also doesn’t support it, so you’re stuck with Internet Explorer (as long as it lasts).