importing firebase-app crashes polymer

[microo8]

Description

• Creating an new polymer starter-kit
• installing bower install --save firebase/polymerfire and just by importing
• and just by importing:

  <link rel="import" href="../bower_components/polymerfire/firebase-app.html">
  <link rel="import" href="../bower_components/polymerfire/firebase-auth.html">

breaks Polymer definition with error:

Uncaught TypeError: Polymer is not a function
    at firebase-auth.html:63

tested on firefox and there is everithing ok

Expected outcome

page renders correctly

Actual outcome

no page shown and this error:

Uncaught TypeError: Polymer is not a function
    at firebase-auth.html:63

Live Demo

just create the polymer starter-kit and install polymerfire to it

Steps to reproduce

1. create an polymer starter-kit project
2. install polymerfire
3. import firebase-app and firebase-auth in my-app.html
4. firebase serve
5. open localhost:5000 on chrome

Browsers Affected

• [ x] Chrome
• [ ] Firefox
• [ ] Safari 9
• [ ] Safari 8
• [ ] Safari 7
• [ ] Edge
• [ ] IE 11
• [ ] IE 10

[microo8]

updating chrome to 58.0.3029.110 fixed it