Mozilla Firefox vs DuckDuckGo Browser in 2026

Firefox and DuckDuckGo Browser both come from organisations that do not make their money from profiling you, and both are recommended to people leaving Chrome for privacy reasons. They suit very different people, though. DuckDuckGo builds the simplest private browser it can. Firefox builds a complete browser with privacy built in, and leaves the rest up to you.

Defaults versus depth

On privacy, DuckDuckGo scores 5 in our ratings and Firefox scores 4. Both block trackers, protect against fingerprinting and remove email trackers. DuckDuckGo then goes further without asking: it blocks ads, dismisses cookie consent banners and strips targeted advertising from YouTube, and its Fire Button clears tabs and browsing data in one tap. Firefox does none of the first three without an extension, so a fresh Firefox install is quieter than Chrome but noisier than DuckDuckGo.

Firefox's answer is depth. It scores 5 for extensions against DuckDuckGo's 2, because DuckDuckGo does not support extensions at all. If you add uBlock Origin, which runs at full strength on Firefox, the blocking gap mostly closes. Firefox also scores 5 for customizability against 2, with a configuration layer that reaches into how the browser behaves, plus containers, on by default since Firefox 153, which keep sites' cookies apart. And it has the workspace tools DuckDuckGo leaves out: vertical tabs, split view, tab groups, reader mode and page translation.

Both score 4 for ease of use, for different reasons: DuckDuckGo because there is almost nothing to learn, Firefox because its defaults are sensible even if you never open the settings.

Engines and platforms

Firefox runs Gecko, its own engine, on Mac, Windows, Linux and Android; on iOS, Apple requires it to use WebKit. DuckDuckGo builds on the engine the operating system provides: WebKit on Mac and iPhone, Android's Chromium-based WebView on Android, and Microsoft's Chromium-based WebView2 on Windows. It has no Linux version, which settles the question for anyone who uses Linux.

What each one charges for

Both browsers are free, and both sell extras. Firefox now includes a free built-in VPN: since Firefox 149 in March 2026, desktop users in a growing list of countries get 50 GB a month of VPN browsing with a Mozilla account. It covers browser traffic only. DuckDuckGo's VPN is part of its subscription, $9.99 a month, which also covers personal information removal and identity theft restoration help, both aimed at the US. On AI, both score 3: DuckDuckGo offers Duck.ai, a private chat front end to several models, while Firefox has sidebar chatbots and on-device features, and since Firefox 148 a single switch that blocks all of them.

Which should you choose?

Choose Firefox if you rely on extensions, want to shape the browser to your habits, use Linux, or want a free VPN for your browsing. Install a content blocker on day one and its privacy comes close to DuckDuckGo's.

Choose DuckDuckGo Browser if you want the strongest protection you can get with no decisions, use no extensions, and value a small, quiet browser that clears itself with one tap. It is the one to install for someone who will never open a settings page.