Please register a new account [here] and you will get an email with login to your dashboard.
We currently support the following platforms and OS: Chrome: Supported on Desktop and Mobile Browsers. Supported on Windows, Android, Mac OS X, and Linux. Firefox: Supported on Desktop and Mobile Browsers. Supported on Mac OS X, Windows, Android devices and Linux.
Yes, we can implement if you have your own domain and want to have your notifications come from your domain name.
Web Push Notifications generally work only on SSL sites (HTTPS), however ProPush provides this feature for HTTP sites by assigning you a free HTTPS subdomain, which allows them to work as if your site were HTTPS.