Please indicate fronts
I enjoy seeing the movement of air masses as indicated by graphic front representation. I would love to see a filter with fronts applied to the Windy map! :)
This would be nice but see why it is not feasible:
As explained by @idefix37, this is not possible.
As an alternative, you can use Humidity map at 700hPa with a specific color above 90%. This level of humidity will indicate a potential front. You can combine it with the temperature map at 850hPa to see the air mass with different temperatures indicating fronts as well