Some svg tests:

bluegrayavatar.png

This is a png image using a normal <img> tag

bluegrayavatar_error.png

This is an svg image using an <object> tag (This should be a png image if your browser does not support svg)

bluegrayavatar_error.png

This is a compressed svg image using an <object> tag

bluegrayavatar.svg

This is an svg image using an <img> tag

bluegrayavatar.svgz

This is a compressed svg image using an <img> tag

svg image can't be displayed
This is an inline svg image in the page source
hallo
Valid CSS