It appears that firefox treats the svgs as IFRAMEs, which leads to trouble when clicking any link from inside the SVG. This could be prevented by including the SVG code directly in your html.
<object type="image/svg+xml" data="....svg">
<img src="....png" />
When hovering over one graph, you could display relative performance to the hovered graph on the other graphs (like "+23%" or "-13%").
If you're going for SVG + JS, it would be useful to allow different groupings of results in multi-way-tables. The default may be
and I'd like to be able to switch to
Re-ordering based on the selected test could be useful as well, i.e. "order the systems by Test1's results".