For Credit Card payment security (PCI), ecommerce sites should not have TLS1.0 and TLS1.1 enabled. 
This requires that user have a Web browser that supports TLS 1.2.  Below is a list of the first version availble of each browser that supported TLS 1.2. 

TLS 1.2 Support
https://en.wikipedia.org/wiki/Template:TLS/SSL_support_history_of_web_browsers

Chrome             v30-32         2013/14
Firefox      27–33,  ESR 31.0–31.2    2014
Internet Explorer    10        2011 - requires TLS1.2 to be manually enabled 
Internet Explorer    11        2013/2015 
Opera            17-19        2013 / 2014
Apple Safari        7        2013/2015