Now you know Using Custom Background Image On Your Google’s Home Page In Chrome. This tutorial is on a similar Google Chrome extension that enables you to use a custom background in your Google Plus page and this is not just limited to Google Plus home but with this cool extension you can set images for G+ background, +1 button, share button, notification and also the bell.
How to start? Simply add Custom Google Plus Background in your Google Chrome browser or Chromium. Now after installation you can use it from the extension drop down menu added next to address bar.