URL: https://lichess.org

Browser / Version: Firefox 87.0
Operating System: Ubuntu
Tested Another Browser: Yes Chrome

Problem type: Design is broken
Description: Images not loaded
Steps to Reproduce:
When playing a tournament https://lichess.org/swiss/RFzaBYrj Firefox did not show svg chess pieces nor chessbaord (randomly, not easy to reproduce) and the ChessBoard was black , but when going to Chromium all was ok. See image capture : https://ibb.co/3h24X0g

View the screenshot

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