Recently I just noticed that Firefox renders the font as if it’s in high contrast mode or without anti-alias, especially for Japanese font face like Noto Sans.
After googling around, I found a workaround to make it a little smoother.
First, open Firefox (of course) and type
about:config in the address bar (just accept the warning).
In the search bar, type the following and hit enter
Now modify the value from
It’s not as smooth as in Chrome, but a little bit better.