steam-ids.user.js

// ==UserScript==
// @name Steam Profile/Group permalinks
// @version 0.2.0
// @author KorDen
// @grant none
// @include *//steamcommunity.com/id/*
// @include *//steamcommunity.com/profiles/*
// @include *//steamcommunity.com/groups/*
// @include *//steamcommunity.com/gid/*
// ==/UserScript==

( function() {
	var chatB = $J('.joinchat_bg');
	var abuseId = document.getElementsByName("abuseID");
	if(chatB.length > 0) {
		gId = chatB.attr('onclick').match(/\d+/)[0];
		var html = '<a href="//steamcommunity.com/gid/'+ gId + '">Permalink</a> | ';
		if($J('#leave_group_form, .grouppage_pending_invite_description').length > 0)
			html += '<a href="//steamcommunity.com/gid/'+ gId + '/history">History</a> | ';
		html += '<a href="steam://friends/joinchat/'+ gId + '">Chat</a><br>\
		<br>Group ID: <input type=text value=' + gId + ' size=17 readonly><br><br>'
		$J('.membercounts:last').before(html);
	} else if(abuseId.length > 0) {
		var steamId = abuseId[0].value;
		$J('div.profile_rightcol').prepend('<div><a href="//steamcommunity.com/profiles/' + steamId + '">Permalink</a> | \
		<a href="javascript:ShowNicknameModal();">Add nickname</a><br>\
		<a href="//steamcommunity.com/profiles/' + steamId + '/posthistory">Post history</a> | \
		<a href="//steamcommunity.com/profiles/' + steamId + '/namehistory">Name history</a><br>\
		<a href="https://steamrep.com/profiles/' + steamId + '" style="color:#d09070;" target=_blank>SteamRep</a><br>\
		SteamID: <input type=text value='+ steamId + ' size=19 readonly><br><br>\</div>');
	}
})();