title: How to remove all data from a Firebase database?
body: <p>I started using a code that using <a href="https://firebase.google.com/" rel="noreferrer">Firebase</a> realtime database. I implemented it to my solution. Connection and control was perfect, so I used it for the production environment.</p>
  
  <p>After a while I was doing upgrade and I need remove all data again - but wait, there are no delete buttons in <a href="https://console.firebase.google.com/" rel="noreferrer">console</a> anymore at highest root level and only allowed in one selected item at once:</p>
  
  <pre><code>https://console.firebase.google.com/project/{{project_name}}/database/data
  </code></pre>
  
  <p>In last update shown only this message and no steps what next:</p>
  
  <blockquote>
    <p>Read-only &amp; non-realtime mode activated to improve browser performance
    Select a key with fewer records to edit or view in realtime</p>
  </blockquote>
  
  <p>Q how can I remove all data at once?</p>