To reproduce:
- Go to the website.
- Wait or scroll down until the page crashes with the message, "The process for this web page crashed or was terminated. To continue, try reloading the page or open a different website."
Both compatibility mode and a clean profile did not fix the issue.
I keep getting this popup message when I visit the site:

Here's the crash log:
Should not crash. Right now I can't use this website on Orion RC / Beta.
0.99.128.2.1.1-rc (WebKit 619.1.11.111.2)
Mojave (10.14)