Disappointed that you do not have the True Key by McAfee add-on. Seems like you want to limit password extensions to your own.
Hi @sam4905, sometimes large companies like McAfee prefer that people download their extensions from their own websites, so they don’t list those extensions on addons.mozilla.org. I was just able to download True Key from the URL offered in this post on McAfee’s support forums.
Hope this helps!