Proposal related to Content Handling UI in mozilla.dev.apps.firefox

Not all build in feed and microsummary types are included in the picture
Uninstall/delete button is grayed out for build in types
Every item on the list will start with one of these followed by a colon (Sorted in this order):
- Feed
- Smart element (Microformat/Pointer)
- File type
- Protocol
All microformats will be grayed out if "Enable smart elements" is unchecked
Drop down box should have content like this (+ icons):
Please excuse my lack of graphics skills and mixing of XP/Vista
Update 2

Update 3

Microformats does not have a name in the UI
Drop down box can hold many different types of apps:
- Build in Firefox functionality and extensions
- Applications registered in the OS
- Application (singular or plural?) selected by the user - How should the user be able to select an application?
- Web services registered in Firefox - How should the user be able to manage (delete) these?
- Plugins installed in Firefox - If multiple plugins exists for one type of content, users should be able to choose between them.
- More?