Browsing functionality for paused application threads is done in the debugger, not the browser. Think of the debugger as a specialized browser for paused application threads.
However, you can browse a list of current application threads in the browser, along with a text message describing their state, by choosing Go > Threads in the project window, editor, or debugger.
If you double-click on a thread name in that list, Functional Developer opens a debugger window on the thread, or, if it already exists, raises the debugger window for the thread, thus pausing the application. Once in the debugger, you can browse the local variables and parameters in call frames in the usual way. See "Browsing run-time values of variables and constants" on page 89.