Raw Source
flx / Facebook Squarer

// ==UserScript==
// @name         Facebook Squarer
// @updateURL https://openuserjs.org/meta/flx/FacebookSquarer.meta.js
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  I don't want round avatars or fields, dammit!
// @icon https://i.imgur.com/StXZY8M.png
// @author       flx
// @match        http*://*.facebook.com/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    function addGlobalStyle(css) {
       var head, style;
       head = document.getElementsByTagName('head')[0];
       if (!head) { return; }
       style = document.createElement('style');
       style.type = 'text/css';
       style.innerHTML = css;
       head.appendChild(style);
   }
   
   addGlobalStyle('body * { border-radius: 0 !important; }');
})();