OSX 10.14.6, Safari 13.0.4 (Unicode UTF-8), Firefox 72.0.1,
From this screen shot you can see about 2/3 of the way down the page my browser stops displaying certain special characters leaving just a square box.
https://www.key-shortcut.com/en/writing-systems/35-symbols/arrows
I have pasted this link into all the browsers I have and the results are the same.
This leads me to conclude that I am missing some system font of some kind or the one I have is corrupted or incomplete or something.
If you know how to fix this please advise.