It half-opened for me, bogged down, and on re-load crashed the Firefox tab.

had the same experience, even in private windows without any plugin. People really goes to great length to make sure their text is unreadable for some of their users.

Funnily enough, it works "great" on Librewolf (with quote around "great" because that design is awful, eating most of the screen estate with a fixed menu)

Yeah unfortunately it breaks Firefox for me.