title: How do I port a chrome extension to firefox add-on with promises and callbacks
body: <p>I am porting a chrome extention to firefox. The extentions UI displays it's sign-up and sign-in form but after a succesfull sign-in the extentions (popup) goes blank, Can anyone point me to the right direction?  I am looking at my manifest.json and backgroung script  but everything seems to be in order.
  Thank you</p>
  
  <p>I have installed running webpack plugings for development webpack-webext-plugin and webextension-polyfill... but still noting changes</p>