title: What ProGuard configuration do I need for Firebase on Android?
body: <p>When using the <a href="https://www.firebase.com/">Firebase</a> SDK for Android apps, I keep getting warnings and errors like these (in Eclipse):</p>
  
  <pre><code>Warning ... can't find referenced class ...
  Warning: there were ... unresolved references to classes or interfaces ...
  You may need to specify additional library jars (using '-libraryjars') ...
  </code></pre>
  
  <p>Unfortunately, Firebase doesn't have any official documentation about its use with ProGuard.</p>
  
  <p>What directives do I need for my apps to successfully compile releases with Firebase when obfuscated with ProGuard?</p>