manifest.json

{
    "manifest_version"  : 2,
    "name"              : "Rollercoin Ratio",
    "version"           : "1.0",
    "description"       : "Rollercoin extension to display miner power/cost ratio.",
    "permissions"       : ["activeTab","tabs","storage"],
    "icons": {
        "16"    : "icons/icon16.png",
        "32"    : "icons/icon32.png",
        "48"    : "icons/icon48.png",
        "128"   : "icons/icon128.png"
    },
    "browser_action": {
        "default_popup" : "popup.html",
        "default_icon"  : {
            "48": "icons/icon48.png"
        }
    },
    "content_scripts": [{
        "matches"   : ["https://rollercoin.com/marketplace*"],
        "js"        : ["app.js"]
    }],
    "background": {
        "scripts": ["background.js"]
    },
    "browser_specific_settings": {
        "gecko": {
            "id": "blahblah@blah"
        }
    }
}