"your Browser Is Not Supported Anymore" Trying To Login With Google Account To Activate New Install

I have a 3 PC license for IS 2016 and currently have one machine activated. Trying to activate a win8.1 laptop. Used the install package from the email I got when I first purchased the product. Originally set up the account with my Google login.

Clicking on the grayed out B icon in the system tray brings up a form to create an account... I'll click Sign in, then the Google button, and instead of a login prompt I just get the message "Your browser is not supported anymore. Please update to a more recent one." with download links for Chrome, Firefox, IE, and Safari. The system has Firefox 47.0.1 already installed and set as default.

Is the initial installation of IS 2016 using an outdated rendering engine or somethng?