Unfortunately, at the time of this writing there are two nsIExtensionManager Interfaces:
- nsIExtensionManager (Toolkit) - needs short summary
- nsIExtensionManager (Suite) - needs short summary
Note that Firefox 4 has replaced use of nsIExtensionManager in favor of Add-on Manager.
This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. If an article link referred you here, you might want to go back and fix it to point directly to the intended page.