Feature: Enable User Customization [ cross-origin-resource-policy ]

Hi,

I working to customize my Lichess with User Css ( Chrome Extension ), I started with ChessBoard below an example of my work


This is work well on :

- TV
- Play a match
- Preview match
- Learn

This doesn't work on ( below an example ) because required (cross-origin-resource-policy)

- Practice
- Study
- Training


This is show my Chrome DevTools / Network

> To use this resource from a different origin, the server needs to specify a cross-origin resource policy in the response headers:
> Cross-Origin-Resource-Policy: same-siteChoose this option if the resource and the document are served from the same site.
> Cross-Origin-Resource-Policy: cross-originOnly choose this option if an arbitrary website including this resource does not impose a security risk.

and this on the DevTools / Console

> net::ERR_BLOCKED_BY_RESPONSE

I solve it, I wrote a user javascript code ( for now change only King from player board ), but is initial point for change all :-)

openuserjs.org/scripts/salsan/Customize_Chessboard