Configure MathJax Fonts

Is it possible to select a MathJax font? It seems that STIX is being used by default.
Normally, one would add:
```

MathJax.Hub.Config({
"HTML-CSS": {
preferredFont: "TeX"
}
});

```
but of course scripts are disabled. It would be nice to have an option like:
```
mathjax:
preferredFont: TeX
```
in the YAML metadata.