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

Why would you want it on a resource limited tablet?

1. Apps are full screen with limited chrome already.
2. Separate processes will just eat up limited memory.
3. It won't be any more compatible than microb or any other Mozilla-based browser.
4. It won't be any faster or use less memory because it's "highly stripped down".

I also think there are problems using XUL before we get Gtk+ 2.10 as part of Maemo 4.0.

Being faster was my hope (sigh )

I'd very much doubt it would be: the speed problems from a browser come from the complexity of parsing the HTML, JavaScript, CSS; building a DOM, executing the JavaScript, applying the CSS/laying out and rendering.

The UI, bookmarks, etc. are practically negligible in terms of speed or memory usage.