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For those using Firefox instead of Chrome, here's a Greasemonkey version of @Kos extension:

// ==UserScript==
// @name        SO Hide Questions
// @namespace   http://stackoverflow.com/
// @include     http://stackoverflow.com/
// @version     1
// @grant       none
// ==/UserScript==

(function() {

    var head = document.getElementsByTagName('head')[0];
    var style = document.createElement('style');
    style.type = 'text/css';
    style.innerHTML = "[CSS style from @Kos answer]"
    head.appendChild(style);

    [content of $(document).ready(function() from @Kos answer]
    
})();

Disclaimer: I am new to both Greasemonkey and JavaScript, but the above seems to work. If not, please comment.