Unable to post addon - SDK+WebExtension to AMO

Add-ons addons.mozilla.org
#1

We developed Firefox version of our existing Chrome extension using WebExtension. but the problem we faced during development is Proxy Api (chrome.proxy) which is still not supported. (https://bugzilla.mozilla.org/show_bug.cgi?id=1283639). So the only workaround left for us to use legacy proxy settings, so we went to build Hybrid - sdk+Webextension.

We are trying to post the addon to AMO and getting this error: "Starting with Firefox 53, new extensions on this site can only be WebExtensions."
Is their any way to post the addon? or when you are planning to support Proxy API (chrome.proxy)?

#2

As of Firefox 53 only new extensions using the WebExtension API can be submitted. Updates to extensions using the SDK will be accepted until Firefox 57.

As for when or if they’ll add the Proxy API, I couldn’t say.

#3

I am also waiting for the Proxy API for one of my addons which is supposed be included in FF55.
However, it won’t be the same as chrome.proxy