The final Quit WebDriver currently will not work, as the input table is empty and thus the browser will remain open. You can circumvent this by connecting the Quit WebDriver with the very beginning of the workflow (e.g. directly to the Start WebDriver node), and then add an additional Flow Variable connection from the End If to the Quit WebDriver which will serve as synchronization.
Does this make sense?
[edit] Please check this post which describes the idea of using Flow Variables as synchronization utility: Selenium Nodes: All Loop Iterations Repeat First Page Content