Diagram renders fine in Safari; here's a screenshot of the diagram: http://i.imgur.com/GoytjRf.png

Yeah, that happens on firefox for me as well.

Firefox has been falling behind of late. Every third website seems to have a huge banner video these days, and firefox chooses to run them automatically, and it can't seem to do so snappily. Makes the entire UI unresponsive, including the chrome outside that tab. Google maps is unusable on firefox as well for several months. Many are the flash videos that my firefox can't run because they changed some default and I can't be arsed to locate it. I just switch to chrome, which seems to handle them without problems using the same supposedly-insecure flash plugin.

(I'm on linux.)

On Win8.1, Firefox (Nightly 45.0a1) loads up the PDF and all illustrations without difficulty. Haven't tried on other platforms. Of course, now what's left to do is reading the article...

I was thinking "that's some architecture you got there..." haha

All good in Chrome viewer.