Most forms and interactions currently result in full page reloads. This can be made lighter-weight and enhanced through AJAX and iframes. These interactions include things like: * demo like * comment post and reply
This is a bit too vague as a single task, pushing up in milestones as a tracking bug. FWIW, bug 632108 covers the first bullet in comment #0. There may be more areas to improve with lightweight UI responses vs full-page refreshes
Updating this bug to tackle the second point of comment 0 specifically. We can open separate bugs under the "Demo Studio" or (better yet) "Performance" component for other issues.
Demo Studio is being retired from MDN and archived as of end January 2016