Smart GWT 4.1 supported Browsers Version

Hi,

We are in the process of updating Smart GWT from 3.0 to 4.1
and we need to know what are the version of each Browsers that Smart GWT 4.1 supports.

What is the recent FireFox version that SmartGWT 4.1 supports?
What is the recent Chrome version that SmartGWT 4.1 supports?
What is the recent IE version that SmartGWT 4.1 supports?
What is the recent Safari Browser version that SmartGWT 4.1 supports?

Thanks