title: How to edit locked properties in firefox about:config
body: <p>I want to stop firefox from updating manually</p>
  
  <pre><code> 1. Tried to make the app.update.url as empty string, but it doesn't work. 
   2. Tried installing in some other folder rather than C:/ProgramFiles so that
      Automatically Install Updates option is not greyed out in Options&gt;Advanced, but no success.
   3. Tried looking at prefs.js but the options which are locked in about:config don't 
      even appear in that file.
  </code></pre>
  
  <p>Tired of uninstalling and reinstalling firefox again and again. Does anyone know how to edit locked properties like <strong>app.update.auto</strong> and <strong>app.update.enable</strong> in <strong>about:config</strong>??</p>