试试我这个 one-line 脚本, 添加到书签栏里, 需要复制时点一下, 专治什么 CSDN 、360 图书馆这种不让复制的邪门玩意

javascript:window.oncontextmenu=document.oncontextmenu=document.oncopy=null; [...document.querySelectorAll('body')].forEach(dom => dom.outerHTML = dom.outerHTML); [...document.querySelectorAll('body, body *')].forEach(dom => {['onselect', 'onselectstart', 'onselectend', 'ondragstart', 'ondragend', 'oncontextmenu', 'oncopy'].forEach(ev => dom.removeAttribute(ev) || (dom[ev] = e => e.stopPropagation())); dom.style['user-select']='auto';});