Basically, each font in each size uses some handles in a renderer. At 10000 handles, the tab renderer dies. They have a font cache but never clear it. When enough render processes together use too many GDI handles, the whole Windows desktop breaks down.

I've never once had an application in Linux crash the whole OS - or at least not so long as I've had physical access to the machine (I've had rouge database requests brick a server before because it took down sshd - but that's a different story)

In fact on the laptop I'm on now, the parent link crashed Firefox. But it OOM'ed and got killed before I even noticed there was a problem (and that's on a beefy desktop environment with compositing enabled too)