We are still finishing the Brackets extension that you'll need to install for URLs of the Developer Mode to open in Brackets. Please give us a few more days for finalising that and releasing it. So stay tuned!
Just to be clear, an important thing to understand is that the goal of the Brackets extension is quite different from CRXDE Lite: It won't be about hacking potentially everything there is in the content repository, but about offering an efficient workflow for web developers when they work on a project. This is important, because you won't be able to edit things that aren't part of a project. A project consists in a list of paths from the content repository that have been serialized to the file system in the vault format (like in AEM packages). The Brackets plugin then offers a convenient way to edit these files, and on save immediately pushing the changes to a running instance, so that you can easily see the changes. The Developer Mode integration then offers a nice way to jump back into your project, to easily inspect and edit in Brackets the templates that rendered the current page.
