title: Firefox won't write to SSLKEYLOGFILE
body: <p>When the environment variable <code>SSLKEYLOGFILE</code> is set, Chrome and Firefox are supposed to log ssl information to that file to assist with debugging. After some experimentation, I got it to work in Chrome, but no matter what I do, Firefox won't output anything to SSLKEYLOGFILE.</p>
  
  <p>Note, I am using MacOS</p>
  
  <p>The steps that worked for Chrome are</p>
  
  <pre><code>export SSLKEYLOGFILE="/Users/temp/sslkeyfile"
  open /Applications/Google\ Chrome.app/
  </code></pre>
  
  <p>However, if I run Firefox in the same way, nothing happens, no matter what I try. (I am using the official Firefox build <code>67.0.2</code>)</p>
  
  <p>After some searching, I found <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=1555067" rel="nofollow noreferrer">this bug</a>, which suggests that it is an open bug in Firefox which is fixed in Nightly. However, I tried Firefox Nightly (<code>69.0a1 (2019-06-13)</code>) with the same results. No matter what I do, Nightly won't write to the key log either. What can I do?</p>