This removes the new "Set Google as your default search engine" warning on Firefox-based browsers.
// ==UserScript==
// @name Hide Google Default Search Warning
// @namespace http://www.NematzNetwork.com
// @description This removes the new "Set Google as your default search engine" warning on Firefox-based browsers.
// @include https://www.google.com/*
// @include https://www.google.com/search
// @include https://google.com/*
// @include https://*.google.com/*
// @include http://www.google.com/*
// @include http://www.google.com/search
// @include http://google.com/*
// @include http://*.google.com/*
// @version 1
// @grant none
// ==/UserScript==
var pushdown = document.getElementById('pushdown');
if (pushdown) {
pushdown.parentNode.removeChild(pushdown);
}