Greasy Fork

It runs on all websites, but I can't see the changes in the font. Does it change the fonts of all the pages to these fonts?

Fonts:
Noto Sans - 300 400 500 600 700
Noto Sans HK - 300 400 500 600 700
Noto Sans TC - 300 400 500 600 700
Noto Sans SC - 300 400 500 600 700
Noto Sans JP - 300 400 500 600 700
Noto Sans KR - 300 400 500 600 700

If it doesn't do this, don't let it run on all websites.

I understand the function. No need to answer.

I don't want to install this script. I hope this script becomes a library.