Iceweasel is a fork [from Firefox] with the following purpose :

  1. backporting of security fixes to declared [:DebianStable:Debian stable] version.

  2. no inclusion of trademarked Mozilla artwork (because of #1 above)

Beyond that, they will be basically identical. (quoting Roberto C. Sanchez post in [http://lists.debian.org/debian-devel/2006/10/msg00665.html debian-devel] mailing list)

Also note that iceweasel is NOT Iceweasel from [http://www.gnu.org/software/gnuzilla/].

Invoke it using one of this ways:



or simply


For ["Gnome"] launcher, use

 /usr/lib/iceweasel/iceweasel "%s"

to open a concrete page.

How to install Iceweasel (Firefox)

To install Iceweasel, simply do:

aptitude install iceweasel   #(it provides mozilla-firefox)

GNOME users might also want to install GNOME support:

aptitude install iceweasel-gnome-support

Native language versions are also available.


The plugin directory is

for more info on iceweasel plugins, refer to the plugins section of the ["Mozilla"] page.

It has Javascript enabled by default.

Useragent string

IceWeasel's useragent string (on DebianTesting, at the time of writing... ) is : Mozilla/5.0 (X11; U; Linux i686; en-US; rv: Gecko/20080129 Iceweasel/ (Debian-

Some application are checking the browser's useragent string, which prevent you from accessing the site. You can use the [https://addons.mozilla.org/en-US/firefox/addon/59 User Agent Switcher] plugin, then download a UA profile :

[http://www.geticeweasel.org/useragent/ geticeweasel.org] has more information on Iceweasel useragent string.

SSL / Secure Connection warning

The message :

Can be disabled. see : http://changetheworldwithyourpassion.blogspot.com/2008/07/turn-off-secure-connection-failed-in.html


  1. My iceweasel is consistently crashing on a website
  2. First run iceweasel without loading any extensions and see if the problem persists. This can be done by using the -safe-mode option

    iceweasel -safe-mode

    mv ~/.mozilla/iceweasel ~/old_iceweasel
    iceweasel &

Unsuported Browser Error

Useragent Change in Iceweasel





Iceweasel not firefox/

Now you can browse mlsni.net with no problems. Everything works just like it would in firefox.

Restart Firefox.

See also