Reasoning for Extension Rejection

I submitted my extension for review in the Mozilla Add-on dev portal and after waiting 2 weeks, it says my extension was rejected. When I hover over the status, it says incomplete for the following reason: “Please complete your add-on by adding a version or missing metadata.” But my manifest file has everything needed to work. If anyone could help, I would really appreciate it!

Here is the manifest file: https://github.com/xadamxk/HFX/blob/master/manifest.json

You should have received an email explaining why the add-on was rejected. You might want to check if it was caught in the spam filter. The rejection message should also be visible on the site, though. Just go to the developer page of your add-on, click on Status & Versions, and the latest version should have a link to see the Review History.