This would be damn' nice to have for our tablets. It's a highly stripped mozilla browser, just the needed parts to run online applications.

From its wiki:

WebRunner is a simple XULRunner based browser that hosts web applications without the normal web browser user interface. WebRunner is based on a concept called Site Specific Browsers (SSB). An SSB is an application with an embedded browser designed to work exclusively with a single web application. It’s doesn’t have the menus, toolbars and accoutrement's of a normal web browser. Some people have called it a "distraction free browser" because none of the typical browser chrome is used. An SSB also has a tighter integration with the OS and desktop than a typical web application running through a web browser.

Everything is here: http://wiki.mozilla.org/WebRunner

Hope some developer gets excited about it