In other words, enter Tools > Preferences > Advanced > Shortcuts and duplicate the Mouse standard. Select the copy and choose Edit. Extend the Application tree and double click the Action column in the GestureDown, GestureRight row. Edit to "Close page & Switch to next" and you're done.
Perhaps you need to edit the Advanced > Tabs entry as well to "Cycle in tab bar order", that's however how I've set it

Of course you can edit all gestures in the Shorcut options. I've set the Down, Right gesture to simply "Close tab" and then
added Down, Right, Up to "Close tab & Switch to next" as well as Down, Right, Down to "Close tab & Switch to previous"