When will AMO sign simple WebExtensions?

I wrote a trial WebExtension - it just contains content scripts. I can use it unsigned in Fx43 but presumably not in Fx44.
I see that AMO doesn’t sign them - I get “WebExtensions aren’t allowed yet” When is it planned to be able to sign them?

(It’s not important to me: it replaces 3 existing addons. But this works in Chromium too.)

Support for WebExtensions should be added soon, most likely in the next month or so.

Looking forward to it! Thanks for the feedback jorgev.