Quick Base will be ending support for browsers Microsoft Internet Explorer 9 and 10 on March 31st, 2018. As these browser versions are not supported by Microsoft, they pose increasing security risks to their users and organizations. For more information, check out their blog.
I can't say enough positive things about the entire team at Data Collaborative. They are smart. They are responsive. And they know Quickbase backwards and forwards. In over 5-years of working with them (often), I've yet to present a scenario they don't have a solution for.