WordPress 4.3 “Billie” adds support for “Site Icons”. Just click the “Customize” link in your WP Admin bar or navigate to the Customize Screen under Appearance > Customize. This feature is fully compatible with the Memberlite theme.
The site icon will be shown in browser tabs (you may have heard this called “favicon” in the past), bookmark menus, and on the home screen of mobile devices. WordPress recommends uploading a 512px square image.