If you try following:
Open a new test, start recording and click on checkbox 'Close the Browser when the test closes', then stop recording. Close the test (exit program or open a new test,... etc.)
Open a new test, start recording without to check 'Close the Browser when the test closes', then stop recording. Close the test (exit program or open a new test,... etc.)
In first case the browser will be closed, in second case the browser remains open.
Open a new test, start recording and click on checkbox 'Close the Browser when the test closes', then stop recording. Close the test (exit program or open a new test,... etc.)
Open a new test, start recording without to check 'Close the Browser when the test closes', then stop recording. Close the test (exit program or open a new test,... etc.)
In first case the browser will be closed, in second case the browser remains open.