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<!DOCTYPE html>
<title>-moz-element Iframe Reflection</title>
<script type="text/javascript" charset="utf-8">
function setUsingProxy() {
proxy = document.getElementById('proxy'); = 'block';
no_proxy = document.getElementById('no_proxy'); = 'none';
<div id="name">
Works in: Firefox.<br />
In Firefox you can detect if users are using a proxy using image tags.<br /><br />
<div id="proxy" style="display:none;">
You are accessing the Internet through a proxy (corporate proxy, VPN, or <a href="">Tor</a>).
<div id="no_proxy">
You are accessing the Internet directly. No proxy.
<img src="http://[]/organize.jpg" style="height:0;width:0;display:none;" onerror="setUsingProxy()">