URL: https://fonts.google.com/
Browser / Version: Firefox 55.0
Operating System: Windows 10
Problem type: Text is not visible

Steps to Reproduce

1. Navigate to: https://fonts.google.com/

Expected Behavior: All fonts should be displayed.

Actual Behavior: Some fonts are not being displayed properly.

The fonts are also broken on sites that are using google fonts, and system default fonts are loaded instead...

P.S. I tried to both refresh Firefox and completely reinstall.

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