Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

As title says, I'm trying to install firefox 3.6. However, I have no luck with achieving that.

I tried

apt-get install firefox-3.6

and after installation in about: there is "Firefox 5.0"

How can I force 3.6 to install ?

share|improve this question
possible duplicate of… – Rens Jun 25 '11 at 7:25
it isn't. Because 5.0 IS INSTALLED, not 3.6 by this tutorial – genesis Jun 25 '11 at 10:21
up vote 7 down vote accepted

Firefox 3.6 is only available in Lucid and Maverick repositories. If you are using Ubuntu 11.04 Natty Narwhal, then Firefox 5 is what you get.

You could download Firefox 3.6 from Mozilla and run it from you home or /opt, but if you provide more info about why you want to downgrade, then maybe we can help. Firefox 3.6 support won't last long. Besides, it is much slower than Firefox 5.

share|improve this answer
I do use Ubuntu 10.04.2 LTS because I had internet problems on 11.04 (system releated, not connection) – genesis Jun 25 '11 at 1:41
Do you have any ppa for Firefox installed? I can't think of a reason for Firefox 5 being installed, unless you have a ppa that provides that version, since it is not in Lucid official repos. So, you need to disable the ppa, update and install firefox again. BTW, just use sudo apt-get firefox. No need to add the 3.6 to the command. – lovinglinux Jun 25 '11 at 1:58
Also, it seems Firesheep is not supported on Linux. – lovinglinux Jun 25 '11 at 1:59
After reading what Firesheep does, I don't think it would be approved by Mozilla to be hosted on AMO. You might even get into legal trouble, since the add-on allows to log to web sites with other users cookies. For that reason, I will refrain from helping you any further. Please read – lovinglinux Jun 25 '11 at 2:08

ubuntu: downgrade to firefox 3.6

wget ""

tar xvjf firefox-*.bz2

sudo cp -r firefox /usr/lib/firefox-3.6

sudo mv /usr/bin/firefox /usr/bin/firefox.old
sudo ln -s /usr/lib/firefox-3.6/firefox /usr/bin/firefox-3.6
sudo ln -s /usr/bin/firefox-3.6 /usr/bin/firefox
share|improve this answer

On ubuntu 11.04 you can easily install Firefox from the command line.
Get the amd64.deb packages from here :

Mozilla Firefox 3.6.24 on ubuntu 10.04 to 11.04 x86_64

installation : first remove all of your Firefox 5.0 stuff with dpkg -r or even
dpkg --purge, next install firefox, firefox-branding and firefox-gnome-support :

[acer30:root]:(~)# <b>dpkg -i firefox_3.6.24+build2+nobinonly-0ubuntu0.10.04.1_amd64.deb firefox-branding_3.6.24+build2+nobinonly-0ubuntu0.10.04.1_amd64.deb firefox-gnome-support_3.6.24+build2+nobinonly-0ubuntu0.10.04.1_amd64.deb

share|improve this answer

check out Sometimes you need to do this if the owners of a website you need have put in code and/or features that are firefox version specific.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.