Fonts broken in Firefox

It seems that some of the font families have stopped working correctly in firefox (firefox 20.1.0, windows 10), it seems they work ok in other browsers:

Other than georgia and helvitca the remaining fonts all seem to be the same. I was previously using Whitney without issue.

It seems that for some reason that the font provider is returning a 403 error.

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After further investigation it seems like privacy badger was blocking those requests.