userscript injecting this everywhere:

    window.addEventListener('copy', function copyintercept(e) {
      console.log(copyintercept.caller, 'copy action initiated');
      e.stopImmediatePropagation();
    }, true)
    
    document.addEventListener("contextmenu", bringBackDefault, true);
    
    function bringBackDefault(event) { event.returnValue = true;
                                      (typeof event.stopPropagation === 'function') && event.stopPropagation();
                                      (typeof event.cancelBubble === 'function') && event.cancelBubble();
                                     }