Add your custom images to chrome's background! Available only in url matching https://www.google.com/*
Visit here or on the https://chrome.google.com/webstore/category/extensions and search for ChromeBackground and add it to your extensions
Click on the icon in the chrome's extension toolbar and paste any image url into text field and click Submit. (Note if the image doesnt show up, do press the refresh button)
View the medium post here
Q) How do i clear the background image?
A) Simply press the extension icon and click clear (Note if the image doesnt clear, do press the refresh button)
Images - Icons made by www.freepik.com Freepik from www.flaticon.com