Detailed Strava heatmap in JOSM

I don´t know if it´s known by everyone but I found a detailed (and working) solution how to display detailed Strava heatmap in JOSM.
It´s our friends in Norway that published a thread in their forum.
https://forum.openstreetmap.org/viewtopic.php?id=62991. Use translate and enjoy.

See this recent post in English on this subject
https://forum.openstreetmap.org/viewtopic.php?id=62991