Pulling in SVG via IMG doesn't work in Firefox as at 2010/07/12 - it's coming according to http://hacks.mozilla.org/2010/07/firefox-4-beta-1-is-here-whats-in-it-for-web-developers/?utm_medium=twitter

Original Europe SVG map at http://en.wikipedia.org/wiki/File:Location_European_nation_states.svg

Scaling within an iframe (via viewBox doesn't work on Firefox)

Some text might appear here if you do something (try mousing over Germany)