Specifically, can anyone answer these questions?
- Can I read/write files to disk?
- Can I create an icon that can be placed on the main browser toolbar (i.e., the toolbar that hold the location box, back/forward buttons, etc.)?
- Can I save preferences (about:config)?
- Can I open a preference window (or any window the user can interact with, including popups)?
- Can HTML completely replace XUL (and use attributes like 'oncommand', 'onselect', 'onclick', "flex', etc.)?