GNUzilla is the GNU version of the Mozilla suite, and GNU IceCat is the
GNU version of the Firefox browser. Its main advantage is an ethical
one: it is entirely free software. While the Firefox source code from
the Mozilla project is free software, they distribute and recommend
non-free software as plug-ins and addons. Also their trademark license
restricts distribution in ways that hinder freedom 0.

GNU IceCat  has multiple practical advantages as well, such as better
privacy and security settings, extensive blocking of sites that may
track the user's browsing habits, or the inclusion of LibreJS and other
extensions that help browse without running non-free javascript.

The user manual pages are at
Please contribute by joining the wiki and editing the manuals.

Source tarballs, binaries for generic GNU/Linux systems and translations
are available at

GPG key ID:D7E04784 GNU IceCat releases
Fingerprint: A573 69A8 BABC 2542 B5A0 368C 3C76 EED7 D7E0 4784


This is the 60.3.0 ESR release of GNU IceCat, containing substantial
improvements from the previous major version (v52.x ESR):

 * LibreJS 7.x, now based in the WebExtensions API. It currently
provides a very similar set of features compared with the version
shipped with IceCat 52.x, but its performance and robustness have
greatly improved. Tests and comments are welcome.

 * A set of companion extensions for LibreJS by Nathan Nichols
( are
pre-installed, and provide workarounds to use some services at USPS,,,, McDonald's, and Google Docs
without using nonfree JavaScript.

 * A series of configuration changes and tweaks were applied to ensure
that IceCat does not initiate network connections that the user has not
explicitly requested. This implies not downloading feeds, updates,
blacklists or any other similar data during startup.

 * A new homepage shows the most important privacy and freedom options
available, with explanations for the user to tune IceCat's behavior to
their specific needs.

 * We no longer include SpyBlock, which was IceCat's fork of AdBlockPlus
that allowed to block all third-party requests during "Private Browsing"
mode. Now, we include an extension that blocks all third party requests
by default, and provides a simple interface to whitelist specific
third-party resources on a per-site basis.

 * A basic TOR integration extension is included. Note that you need to
separately run the TOR service at the operating system for this
extension to work. If you use a GNU/Linux system this is usually done by
installing the "tor" package.

Thanks to Giorgio Maone, Nathan Nichols, Nyk Nyby and Zach Wick for
their contribution to LibreJS and IceCat, and happy testing!

If you have a working or partly working program that you'd like
to offer to the GNU project as a GNU package,

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