ata-collection-in-genocides/">Examples from history</a> show that mass surveillance can facilitate enormous harm.</p>
<h2 id="why-web-browsers-are-critical-to-online-privacy">Why web browsers are critical to online privacy</h2>
<p>Once private data has leaked from your computer, phone or tablet, there is not much you can do to control it. But how does data leave your device in the first place?</p>
<p>Your web browser is a likely route: browsers commonly leak data to third parties, revealing what web pages y