Chrome extension that replaces occurrences of 'big booty' with 'big booty' Shouldn't that first 'big booty' be 'big data'? Also, what is the reason for doing

Chrome extension that replaces occurrences of 'big booty' with 'big booty' Shouldn't that first 'big booty' be 'big data'? Also, what is the reason for doing 4 regex replaces with different case? Why not just do one case insensitive replace?