Main screen (overview map) shows SW wind 1110.3m/s everywhere in Firefox with privacy.resistFingerprinting = true

[windymartin2]

1. start Firefox 60 (or similar)
2. go to about:config and set privacy.resistFingerprinting = true
3. go to windy.com
4. see really strong wind (about 1100m/s) blowing from SW

Expected behavior: Displayed wind should be more related to the actual weather