Changes

===== Test add-ons =====

*Do you know Python? Help write [https://github.com/mozilla/Addon-Tests/blob/master/README.md automated tests for AMO]!

*It's also helpful to install the [https://addons.mozilla.org/firefox/addon/add-on-compatibility-reporter Add-ons Compatibility Reporter] and use it to let us know when an add-on is not working properly. The latest version gives you an easy way to report [https://developer.mozilla.org/en-US/Firefox/Multiprocess_Firefox multiprocess Firefox] compatibility.