I hope your experience with Test Studio is going well.
All of Test Studio's test execution functions operate cross-browser. I recommend reviewing our test list settings, especially the Browser and Multi-Browser Execution settings. For instance, our document on Invoking Browser-Specific Actions is especially helpful for targeting a particular browser during test runs. Our documentation on Browser Inconsistencies will keep you updated with an ongoing list of known differences between testing on multiple browsers.
In addition to our documentation, you can access our blogs, forums, videos and support ticket system. You will find us to be very responsive and helpful whenever you have a question on how to accomplish a particular goal or task or have a problem using the tool. The forum is best for questions and the support ticket system is best for reporting problems using the tool.
All the best,
the Telerik team