mozIDOMApplicationRegistry2.installPackage is supposed to trigger the DOMRequest.onsuccess callback and mozIDOMApplicationMgmt.oninstall event *before* starting to download the package of the app. We are currently not doing it :(. To be honest, I don't even know how is this currently working for Gaia :\

Actually, I'd like to know how Gaia is working before nominating for tef+

Julien would be a good person to ask about that.

Well, I'm quite sure it works in gaia :) but I follow your reasoning, Fabrice should know better.

So it seems that this is working on b2g18 but not in m-i, birch or m-c. The reason seems to be Bug 856131

With the attached patch we notify via 'mgmt.oninstall' and 'DOMRequest.onsuccess' as soon as the app is stored in the apps registry for both, hosted and packaged apps. This way consumers of the mgmt API will receive the app object along with the 'mgmt.oninstall' event and will be able to listen to the package download events as expected. James, I am not sure if you expect 'aInstallSuccessCallback' to be fired along with the 'oninstall' and the 'DOMRequest.onsuccess' events or once the package download is completed.

aInstallSuccessCallback is supposed to be called after the end of the download.

Ok, thanks James. That's the way the attached patch works.