URL: https://dictionary.cambridge.org

Browser/Version: Firefox 87.0

Operating System: Linux

What seems to be the trouble?(Required)

• Desktop site instead of mobile site
• Mobile site is not usable
• Video doesn't play
• Layout is messed up
• Text is not visible
• Something else (Add details below)

Steps to Reproduce

1. Visit https://dictionary.cambridge.org and notice the rounded search bar (e.g. "Search English")

Expected Behavior:
The rounded corners should be rendered smoothly, as in Chrome.

Actual Behavior:
In Firefox the rounded corners are not smooth and this seems to only affect any <input> elements.

The rendering is even worse in Fenix.