Concretely

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "manifest_version": 2,
    "name": "Concretely",
    "description": "New tab replacement page with weather widget and customization options",
    "version": "0.7.1",
    "author": "Stanyslas Bres ",
    "icons": {
        "16": "icons\/icon16.png",
        "48": "icons\/icon48.png",
        "128": "icons\/icon128.png"
    },
    "chrome_url_overrides": {
        "newtab": "index.html"
    },
    "content_security_policy": "script-src 'self' https:\/\/www.google-analytics.com; object-src 'self'"
}