Firefox Nightly - Native load test failed

As pointed out in https://github.com/google/fonts/issues/738#issuecomment-333376427 there is a list of fonts that don't load in Firefox Nightly. Please also see the related three comments following the link above. Below a list as of today, 04.01.18.

I opened the detail views of all fonts and some seem to render nicely˚, some render partly†, some don't render at all. This indicates different underlying issues, though I don't know how to dig deeper.

- Baloo Tammudu†
- Bellefair˚
- Cabin Sketch˚
- Kurale†
- Londrina Shadow
- Londrina Sketch
- Londrina Solid
- Pangolin†
- Philosopher˚
- Sedgwick Ave Display
- Sedgwick Ave