What are the best supported browsers and operating systems to use Welby?

Currently, Welby is supported by the following:

Operating Systems
Windows® 7 build 7601 and higher
Mac® OSX 10.12 (Sierra) and higher

Browsers
Chrome™ 68 and higher
Safari® 12 and higher
Firefox™ 62 and higher
Edge™ 15.15063 and higher