I was playing around with RaphaelJS and realized that it gets inline SVG working in Firefox 3.6.22 (at least it looks like it, or am I fooled by Firebug...).
As my own SVG does not show up, I was wondering how RaphaelJS accomplishes this feature when Firefox 3.6 does not support blunt inlining of SVG. I (briefly) looked at the source and also found another answer how inline SVG can work in older Firefox browsers. Still, I am stuck getting this to work for myself (i.e. AJAX-loading SVG and placing it into the DOM).