title: How to get text form Clipboard with JavaScript in Firefox 56?
body: <p>I am writing a Web Extension for myself which at some point needs to take a text from the Clipboard and process it. I am using Firefox 56 and do not want to update it yet.</p>
  
  <p>Apparently, there is a bug in this version of Firefox, such that <strong>document.execCommand("paste")</strong> does not work even when a permission <strong>"clipboardRead"</strong> is set in the <strong>manifest.json</strong> file.</p>
  
  <p>Are there any other options or workarounds to get the text from the Clipboard?</p>