不更改网站首页，让问题详情只留下问题和答案。

TamperMonkey

// ==UserScript==
// @name         Clear StackOverFlow
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       You
// @match        https://stackoverflow.com/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    let re = new RegExp('https:\/\/stackoverflow.com\/questions\/[0-9]+\/.*');
    if (!window.location.href.match(re)) {
        return;
    }
    function deleteEle (element) {
        return element && element.parentNode && element.parentNode.removeChild(element);
    }
    function $(target) {
        if (target[0] === '#') {
            return document.getElementById(target.replace('#', ''));
        } else if (target[0] === '.') {
            return document.getElementsByClassName(target.replace('.', ''))[0];
        } else {
            return document.getElementsByTagName(target)[0];
        }
    }
    deleteEle($('.so-header'));
    deleteEle($('#footer'));
    deleteEle($('#sidebar'));
    deleteEle($('#post-form'));
    deleteEle($('.bottom-notice'));
    deleteEle($('.aside-cta'));
    deleteEle($('#feed-link'));
})();

or

stylish

• chrome 需要指定 正则表达式匹配问题详情的网址

https:\/\/stackoverflow.com\/questions\/[0-9]+\/.*

#feed-link,
#footer,
#sidebar,
#post-form,
.so-header,
.bottom-notice,
.aside-cta,
.everyonelovesstackoverflow {
    display: none;
}

• firefox 则不需要

@-moz-document regexp('https:\/\/stackoverflow.com\/questions\/[0-9]+\/.*') {
    #feed-link, #footer, #sidebar, #post-form, .bottom-notice, .aside-cta, .so-header, .everyonelovesstackoverflow {
        display: none;
    }
}