Googleの検索結果URLから余分なパラメータ削除するやつ - http://let.hatelabo.jp/uneco/let/gYC-yby_yIjbcQ

ggtrim.js

(function(d) {
	var script = d.createElement('script');

	script.textContent = '(' + function(d, l) {
		var   href = l.href
			, hash_index = href.indexOf('#')
			, query_index = href.indexOf('?')
			, hash = hash_index < 0 ? '' : href.substring(hash_index + 1)
			, query = query_index < 0 ? '' : href.substring(query_index + 1, hash_index < 0 ? href.length : hash_index)
			, params = {}
			, p = [];
		
		[query, hash].forEach(function(item) {
			item.split('&').forEach(function(item) {
				var param = item.split('=');
				params[param[0]] = param[1];
			});
		});

		for (var n in params)
			/^(?:q|tbm|tbs)$/.test(n) && p.push(n + '=' + params[n]);

		var   url = l.protocol + '//' + l.host.replace(/^www\./, '') + l.pathname + '?' + p.join('&')
			, input = d.createElement('input')
			, to = d.getElementById('gbx3') || d.getElementById('gbx1');

		input.setAttribute('type', 'text');
		input.setAttribute('size', 60);
		input.setAttribute('value', url);
		input.style.position = 'absolute';
		input.style.right = '0';

		to.appendChild(input);
	} + ')(document, location);';

	d.body.appendChild(script);
	d.body.removeChild(script);
})(document);
	

ggtrim.node.js

#!/usr/bin/env node

var   url = require('url');

try {
	process.stdout.write(ggtrim(process.argv[2]))
} catch (err) {
	process.stderr.write(err.message + '\n');
	process.exit(1);
}

function ggtrim(href) {
	var   l = url.parse(href)
		, hash_index = href.indexOf('#')
		, query_index = href.indexOf('?')
		, hash = hash_index < 0 ? '' : href.substring(hash_index + 1)
		, query = query_index < 0 ? '' : href.substring(query_index + 1, hash_index < 0 ? href.length : hash_index)
		, params = {}
		, p = [];
	
	[query, hash].forEach(function(item) {
		item.split('&').forEach(function(item) {
			var param = item.split('=');
			params[param[0]] = param[1];
		});
	});

	for (var n in params)
		/^(?:q|tbm|tbs)$/.test(n) && p.push(n + '=' + params[n]);

	return l.protocol + '//' + l.host.replace(/^www\./, '') + l.pathname + '?' + p.join('&');
}