[2] Jansson made her senior Sweden debut in a 0–0 draw with Finland in Mariehamn on 25 August 1973, the national team's first ever match.

[3][4] In Sweden's next match on 26 July 1974, also against Finland in Mariehamn, second-half substitute Jansson became the national team's first ever goal-scorer in a 1–0 win.

Returning from a year-long injury absence for the semi-final win over Italy, versatile Jansson was deployed as a full-back.

Sweden beat England in the final, on a penalty shootout at Kenilworth Road, Luton, after a 1–1 aggregate draw.

When Kosovare Asllani scored the national team's 1,000th goal about 40 years after Jansson's first, the occasion was marked at a joint presentation before a match against Northern Ireland in Växjö.