View PDF in Tor browser is fuzzy

This is open in Edge(or other normal PDF viewer, include PDF.js): https://i.loli.net/2019/07/21/5d342843868e089809.png This is open in Tor browser(with PDF.js): https://i.loli.net/2019/07/21/5d342843dd2f844657.png It's same with all PDF.

Trac:
Username: null

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