title: How do I find the logs of Firefox?
body: <p>While browsing the Firefox source code, I see that a lot of logs are present. I'd like to find them on runtime to help me understand and debug something.</p>
  <p>For example, when taking a look at <a href="https://hg.mozilla.org/mozilla-central/file/tip/netwerk/protocol/http/nsHttpTransaction.cpp#l1724" rel="nofollow noreferrer">nsHttpConnection.cpp</a>, Here's what I can find :</p>
  <pre><code>  ...
    LOG((&quot;restarting transaction @%p\n&quot;, this));
    mTunnelProvider = nullptr;
    ...
  </code></pre>
  <p>Where did the LOG lines go ? How do I find the log file containing all the logs generated by Firefox ?</p>