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)?