Privacy Browser 3.20.1 keeps scripts, cookies and DOM storage off by default and lets each domain opt in. Version 3.20 rewrote the block list engine so filtering lands more precisely, and the cache is no longer left on the device.

A privacy minded open source browser for Android that uses profiles to control ad blocking, scripts, cookies and fingerprint protection separately, and lets a profile be bound to specific domains. Bookmarks and history can be backed up. Current version 24.

Waterfox is a cross-platform browser on the Gecko engine with built-in content filtering and vertical tree tabs, and tabs that can be unloaded by hand. Version 6.7.4 brought RSS and live bookmarks back, and 6.7.5 added a subscription manager.

Ungoogled Chromium patches the Chromium source at build time, replacing company domains with invalid ones and blocking internal requests, and publishes every change as a readable patch.

An open-source browser that filters advertising inside its own core instead of relying on extensions. Tracking and fingerprinting countermeasures are tightened on a fresh install, and the address bar will list the requests and scripts behind the page in front of you. It runs on Android, Windows and Linux under a GPL licence.

A browser run by a non-profit foundation, with tracking protection on by default, container tabs that separate identities, encrypted sync the operator cannot read, a built-in PDF editor and thirty thousand extensions. Open source, on five platforms.