How do I specify an Chrome Extension icon (popup icon) for Retina Mac's

Question

I found my icon (and many other icons) very ugly on Retina Macs.

Is there any way that I can specify a well-designed retina image as the popup icon?

Thanks!

Answer 1

Just create double-sized icon (76x76 pixels) and provide path to it in manifest.json:

"browser_action": {
    "default_icon": {
        "19": "icon19x19.png",
        "38": "icon76x76.png"
    }
}

If you want to dynamically change icon via setIcon, then you must call it with following params:

chrome.browserAction.setIcon({
    path: {
        "19": "icon19x19.png",
        "38": "icon76x76.png"
    }
});