As you are going through initial set up of your account, one of the first things you will want to configure are the browsers you are going to be testing against most often. You are able to customize browsers on a test by test basis, but setting your default browsers can create less work for your test writers.
Select Default Platforms:
Click the drop down menu at the top right corner of your dashboard and click "Platforms". Go through the list and check the default browsers you wish to test against and click "Save".
Mobile Web Browsers:
In addition to support for desktop browser testing, Rainforest also offers support for both Android and iOS Mobile Web Testing!