{ "background_color": "rgb(117,117,117)", "description": "Chat from your desktop with Threema Web and have full access to all chats, contacts and media files.", "display": "standalone", "icons": [ { "src": "img/favicon.ico", "sizes": "64x64", "type": "image/x-icon" }, { "src": "img/threema-576x576.png", "sizes": "576x576", "type": "image/png" } ], "name": "Threema Web", "short_name": "Threema Web", "start_url": "." }