Causing wrong rendering of openstreetmap in Pale Moon

Using the Pale Moon browser the edit page of openstreetmap.org is not properly rendered:

The background sat imagery is not shown and the dropdown menu is empty (see attachments: firefox vs palemoon)

I'm using Palemoon 24.7.1 (x86) on Windows 7 Professional SP 1.

Also reported in Pale Moon forum under https://forum.palemoon.org/viewtopic.php?f=29&t=5622

Trac:
Username: pzaccaria