Possible Bug: Using SVG Icons

Add-ons addons.mozilla.org
#1

I had an issue with adding SVG icons for my addon button. According to the documentation, I should be able to add:

"browser_action": {
    "default_icon":  "/content/images/icon.svg",
    …
}

but it doesn’t seem to work. Instead I use:

"browser_action": {
    "default_icon":  {
        "24": "/content/images/icon.svg",
        "48": "/content/images/icon.svg",
        "96": "/content/images/icon.svg"
    },
    …
}

which does work.

#2

Does it make a difference if you don’t use the first /, or if you use a png file?