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GNU IceCat

https://www.gnu.org/software/gnuzilla/
GNU IceCat is the GNU version of the Firefox browser.

IceCat.png IceCat-Screenshot 2.png IceCat-Screenshot 3.png

''GNU IceCat discontinued official IceCatMobile support after version 38.6.0. Unofficial IceCatMobile releases can be downloaded with the F-Droid client.

GNU IceCat (originally GNU IceWeasel) is part of GNUzilla (the GNU version of the Mozilla Application Suite). GNU IceCat is based on the the current official release of Firefox Extended Support Release (ESR) with removal of trademarked artwork and proprietary components.

However, IceCat is not a straight fork of Firefox ESR; instead, it is a parallel effort that works closely with and re-bases in synchronization on the latest Firefox ESR as the upstream supplier, with patches merged upstream whenever possible; although it should be noted that additional security updates are customized to IceCat occasionally.

Differences between IceCat and Firefox ESR

Important differences between Mozilla's Firefox and GNU IceCat is that IceCat has a focus on freedom and privacy (see settings.js for details).

  • Encrypted Media Extensions (EME) is not implemented: Whereas Firefox are being created such that they support Digital Restrictions Management (DRM) systems through their implementation of the Encrypted Media Extension (EME), GNU IceCat doesn't include an EME implementation as it opposes efforts to popularize and ease the dissemination of DRM technology.
    • Widevine Content Decryption Module provided by Google Inc. is not installed in about:addons > Plugins
    • The Play DRM-controlled content option (used to download and enable Widevine Content Decryption Module provided by Google Inc.) has been removed from about:preferences > Content
  • "Accept third-party cookies: Never"
  • WebRTC is enabled like in Firefox but prevent leaking the LAN ip. (Test WebRTC)
  • The proprietary program Mibbit has been removed.
  • Telemetry is disabled.
  • DuckDuckGo is the default search engine, which means that you can run "!Bangs" keywords in the location bar to use any search engine.

Philosophy

"We will always make IceCat block non-free JavaScript by default. If you want to permit nonfree software to run, you can easily disable LibreJS." - Richard Stallman

Customized add-ons

  • SpyBlock (Adblock Plus fork) to block privacy trackers.

History

GNU IceCat was formerly known as GNU IceWeasel but changed its name in 2008 to avoid confusion with Debian IceWeasel (who was rebranded back to Firefox in 2017 after Debian was being granted special permission from Mozilla ref).

The GNU IceCat developers dropped support for Replicant after version 38.6.0 because these builds are already provided by F-Droid.

GNU IceCat developers dropped support for macOS, and Windows, after version 38.8.0 in 2016: "Note that building binary packages for Windows and macOS currently requires non-free software, so we no longer distribute binary releases for those platforms.

See also

Documentation

Why not recommend Firefox? As explained in our Free Software Definition, all four freedoms must be available on both a commercial and non-commercial basis. Mozilla's trademark policy serves to limit Freedom 2 to gratis distribution only, making the software nonfree.

Selection from the FSF shop

Free as in Freedom 2.0, by Richard Stallman

Introduction to the Command Line



Helping the GNU Project and the Free Software Movement



If you have corrections to this entry or questions about it, please contact: mailto:maintainers@gnu.org


"IRC general" IRC general channel
irc://chat.freenode.net/#icecat

Related Projects


Inbuilt extensions, plug-ins, or add-ons for this program

GNU LibreJSBlocks javascript that is non-trivial and non-free.https://www.gnu.org/software/librejs/

Extensions, plug-ins, or add-ons for this program

GreasemonkeyLocally change the way a page looks or works using javascript.http://www.greasespot.net/
RECAPRECAP The Law for Better Access to Public Court Records.https://www.recapthelaw.org/


Licensing

License

Verified by

Verified on

Notes

Verified by

David Hedlund

Verified on

12 July 2015

Notes

"Because we hope and want our privacy enhancements to be picked up by Mozilla itself, we are keeping the same tri-licensing scheme for Gnuzilla/IceCat as GNU uses: MPL/GPL/LGPL." - README.IceCat

Verified by

David Hedlund

Verified on

12 July 2015

Notes

"Because we hope and want our privacy enhancements to be picked up by Mozilla itself, we are keeping the same tri-licensing scheme for Gnuzilla/IceCat as GNU uses: MPL/GPL/LGPL." - README.IceCat

Verified by

David Hedlund

Verified on

15 August 2015

Notes

"Because we hope and want our privacy enhancements to be picked up by Mozilla itself, we are keeping the same tri-licensing scheme for Gnuzilla/IceCat as GNU uses: MPL/GPL/LGPL." - README.IceCat

Verified by

David Hedlund

Verified on

5 October 2016

Notes

"Binaries of this product have been made available to you by the GNU Project under the Mozilla Public License 2.0 (MPL)." - Help -> About IceCat




Leaders and contributors

Contact(s)Role
Rubén Rodríguez (Quidam)Maintainer
David Hedlund (David Hedlund)Add-on repository maintainer


Resources and communication

AudienceResource typeURI
Debian (Ref) (R)https://tracker.debian.org/pkg/iceweasel
Generalhttps://savannah.gnu.org/people/
Savannah (Ref)https://savannah.gnu.org/projects/gnuzilla/
Mailing Listhttps://lists.gnu.org/mailman/listinfo/bug-gnuzilla/
Downloadhttps://alpha.gnu.org/gnu/gnuzilla/
VCS Repository Webviewhttps://git.savannah.gnu.org/cgit/gnuzilla.git/
Mailing Listhttps://lists.gnu.org/mailman/listinfo/gnuzilla-dev/
Generalhttps://tracker.debian.org/pkg/firefox-esr
Mailing Listhttps://lists.gnu.org/mailman/listinfo/gnu-system-discuss/
Downloadhttps://f-droid.org/packages/org.gnu.icecat/
Downloadhttps://ftp.gnu.org/gnu/gnuzilla/
Bug Trackinghttps://www.mozilla.org/en-US/security/known-vulnerabilities/firefox-esr/
Generalhttps://libreplanet.org/wiki/Group:IceCat/


Software prerequisites

This entry (in part or in whole) was last reviewed on 19 January 2019.



Entry























"MPLv2.0" is not in the list (ACEL, AFL-3.0, AGPL-1.0, AGPL-1.0-or-later, AGPL-3.0, AGPL-3.0-or-later, AGPL-3.0-or-later-with-exception, AGPL-3.0-with-exception, AGPLv1orlater, AGPLv3, ...) of allowed values for the "License" property.







"Add-on repository maintainer" is not in the list (Maintainer, Contributor, Developer, Sponsor, Unknown) of allowed values for the "Role" property.


"Debian (Ref) (R)" is not in the list (General, Help, Bug Tracking, Support, Developer) of allowed values for the "Resource audience" property.


"Savannah (Ref)" is not in the list (General, Help, Bug Tracking, Support, Developer) of allowed values for the "Resource audience" property.














"Security Advisories" is not in the list (General, Help, Bug Tracking, Support, Developer) of allowed values for the "Resource audience" property.


"IceCatMobile (F-Droid build)" is not in the list (General, Help, Bug Tracking, Support, Developer) of allowed values for the "Resource audience" property.












Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the page “GNU Free Documentation License”.

The copyright and license notices on this page only apply to the text on this page. Any software or copyright-licenses or other similar notices described in this text has its own copyright notice and license, which can usually be found in the distribution or license text itself.