I hate to change the subject to something so trivial -- because I have been an exclusive Firefox user for many, many years -- but the awful moving background of this website is literally nauseating.
I'm no designer, but I can't understand why someone would make a graphical choice like this. It absolutely detracts from the content, and in my case, will prevent me from reading it.
Plenty of users use the reduced motion option for accessibility reasons. The developer of this page is just an ass for ignoring it.
https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/A...