- new DevTools API (devtools.inspectedWindow and devtools.panels.create)
- changes to ExtensionContent.jsm (to be able to inject a script in the page on document_start during devtools.inspectedWindow.reload)
- differences with behavior of standard APIs (e.g. order of the W3C postMessage parameters)
- timing issues on the message exchange (the panel start to listen to backboneAgent:backboneDetected in a devtools.inspectedWindow.eval callback which can be received too late, when the message was already routed to the panel)
