NOTE: make a backup copy of the options settings in Setup > Options > [cXF] Advanced Footer, make a note of all icon links and icon names, as all these settings will be reset
Changes (for XF 2.3 only):
a major overhaul of the code for social icons, rewritten to make it more efficient and transparent
NEW: option to upload custom image icons; for example, you can now download the free Bluesky SVG icon from Font Awesome and upload it to the Advanced Footer