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     <li><a href="https://ffprofile.com/">ffprofile.com</a> - Helps you to create a Firefox profile with the defaults you like.</li>
     <li><a href="http://kb.mozillazine.org/Category:Security_and_privacy-related_preferences">mozillazine.org</a> - Security and privacy-related preferences. </li>
     <li><a href="https://github.com/pyllyukko/user.js">user.js Firefox hardening stuff</a> - This is a user.js configuration file for Mozilla Firefox that's supposed to harden Firefox's settings and make it more secure.</li>
-    <li><a href="https://addons.mozilla.org/firefox/addon/privacy-settings/">Privacy Settings</a> - A Firefox addon to alter built-in privacy settings easily with a toolbar panel.</li>
+    <li><a href="https://addons.mozilla.org/firefox/addon/privacy-settings/">Privacy Settings</a> - A Firefox add-on to alter built-in privacy settings easily with a toolbar panel.</li>
 </ul>
 
 <h1 id="email" class="anchor"><a href="#email"><i class="fas fa-link anchor-icon"></i></a> Privacy-Conscious Email Providers - No Affiliates</h1>