Jansson left MFF in the summer of 2014 and has since represented Torino, Leeds and most recently Brentford.
The two other new acquisitions – Sebastian Jørgensen and Otto Rosengren – also start on the bench.
Malmö FF tops the Allsvenskan table, two points ahead of the reigning champion Häcken, and also with two games less played. Today’s opposition Mjällby is in ninth place with 16 points.
The match starts at 15.00.