According to McAfee, they plan to release a fix for True Key in Firefox 45 by March 15th (today), and toward the end of the thread, at least one user there got it working by March 12th: https://community.mcafee.com/thread/88669 Could you check whether True Key is enabled in your Firefox? Open the Add-ons page using either: * Ctrl+Shift+a * "3-bar" menu button (or Tools menu) > Add-ons In the left column, click Extensions. Then on the right side look for True Key. If it's disabled, it will be toward the bottom on a grayed background. Can you enable it? ''If it's missing:'' Can you check in your McAfee software on whether there is a setting to enable it for Firefox or push it into Firefox? ''If it's listed but cannot be enabled:'' Try updating your McAfee software to see whether that helps. ''If it's listed as being enabled but isn't working:'' In that case, I would try McAfee support to see whether they know what the problem is. Please let us know how you do.