// ==UserScript==
// @name         Google disable safesearch
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Set off google safesearch
// @author       You
// @include      /^https\:\/\/[a-z]*\.(google)\.[a-z]*/search\?
// @icon         https://www.google.com/s2/favicons?domain=google.com
// @grant        none
// @run-at       document-start
// @downloadURL none
// ==/UserScript==

(function() {
    'use strict';
    window.addEventListener("load",function(){
        disableSafesearch();
    });

    function disableSafesearch() {
        var safeui = document.querySelector("a[aria-label][href*='setprefs?sig']");
        if(safeui != null){
            if(safeui.href.match(/safeui=off$/) == null){
                window.location = safeui.href.replace(/safeui=(on|images)$/,"safeui=off");
                console.log("Google disable safesearch: done!");
            } else {
                console.log("Google disable safesearch: nothing to do!");
            }
        } else {
            safeui = document.querySelector("a[href*='setprefs?sig'][href$='safeui=off']");
            if(safeui != null) {
                window.location = safeui.href;
                console.log("Google disable safesearch: done!");
            } else {
                if(document.querySelector("a[href*='setprefs?sig'][href$='safeui=on']") != null){
                    console.log("Google disable safesearch: nothing to do!");
                } else {
                    console.log("Google disable safesearch: failed!");
                }
            }
        }
    }
})();