Window arrangements using tabbed user interface elements

Methods and systems for controlling window arrangements for tabbed user interface elements. An example method includes displaying a plurality of application windows including at least one application window for a web browser application having multiple open tabs, the multiple open tabs including at least one active tab and multiple inactive tabs, receiving an input to invoke a snap assist mode; in response to the input, display a snap assist user interface to reconfigure the display of one or more the plurality of the application windows, the snap assist user interface including tab representations and an application-window representation. In response to receiving a selection of a tab representation, a web browser application window is displayed with the corresponding tab as the active tab.