Segfaulted for me as well. FF v29.0.1, Arch Linux x86-64, kernel v3.14.3, Intel HD4600 under Mesa/Intel DRI v10.1.3. The WebGL test link posted by azakai does exactly the same thing though.
Does your crash show up in Firefox's about:crashes page? The crash report might show whether it odds the same missing GL symbol the Arch Linux discusses.
Discussion: https://bbs.archlinux.org/viewtopic.php?id=181408
Worked really smoothly on Windows.