Who to notify that their browser is not supported in our new website
<p>We are upgrading our website to be responsive and thus using HTML5 throughout. We also take Paypal to make purchases online. Paypal's standards are changing along with other payment processors to TLS 1.2 for their API. Does this mean that only client browsers that support TLS 1.2 will be able to submit payments through us when making purchases on our site? I believe that client to our server connection is independent of our server to paypal connection. I need to notify users of old browsers when they visit our site to upgrade if they use IE8 anyway as HTML5 is not supported. I am trying to figure out if any other browser users need to be notified.</p>