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 several ways incompatible with freedom 0. https://www.gnu.org/software/gnuzilla/
The user manual pages are at http://libreplanet.org/wiki/Group:IceCat/ You can contribute by joining the wiki and editing the manuals. Source tarballs, binaries for generic GNU/Linux systems and translations are available at http://ftp.gnu.org/gnu/gnuzilla/31.6.0/ GPG key ID:D7E04784 GNU IceCat releases Fingerprint: A573 69A8 BABC 2542 B5A0 368C 3C76 EED7 D7E0 4784 == Changes since v31.5.0 == Other than applying the upstream fixes listed here https://www.mozilla.org/en-US/security/known-vulnerabilities/firefox-esr/ the only change for this release is the removal of the CNNIC root certificates, as explained at http://googleonlinesecurity.blogspot.com/2015/03/maintaining-digital-certificate-security.html https://blog.mozilla.org/security/2015/03/23/revoking-trust-in-one-cnnic-intermediate-certificate -- If you have a working or partly working program that you'd like to offer to the GNU project as a GNU package, see https://www.gnu.org/help/evaluation.html.