Facebook Menu bar fix position

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "manifest_version": 2,
    "name": "Facebook Menu bar fix position",
    "description": "This extension will force the menu bar to position fix at the top.",
    "version": "1.0",
    "content_scripts": [
        {
            "matches": [
                "https:\/\/www.facebook.com\/*"
            ],
            "css": [
                "mystyle.css"
            ]
        }
    ],
    "browser_action": {
        "default_icon": "icon.png"
    }
}