Omaha is a service which we ask questions like: "I've got version $x of $foo, what should I do?". We use it for extensions as well as the main browser update.

Omaha is a service which we ask questions like: "I've got version $x of $foo, what should I do?". We use it for extensions as well as the main browser update. The CRLSet is packaged as an extension (it's actually a .crx), but with a custom install callback that delta updates the current version.