Load sites—side by sideWhen browsing a page a simple right click (or control + click) will reveal a contextual menu to open the current page within Side by Side.
A discrete options menu is located at the top (or left, depending on orientation) which allows the user to rotate the orientation, flip the position of panes, or add panes.
*Note, this extension relies on iFrames, but not all websites can be loaded via iFrame.