Installing Firefox 4.0 (.deb Package) On Ubuntu 10.10

Version 1.1
Author: Falko Timme
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Last edited 03/25/2011

In this short guide I will show you how you can install the new Mozilla Firefox 4.0 browser (released March 22, 2011) on an Ubuntu 10.10 desktop. Fortunately, there's a Launchpad PPA repository that has Firefox 4.0 .deb packages, so we can easily install it through Ubuntu's package manager.

I do not issue any guarantee that this will work for you!


1 Adding The Firefox 4.0 PPA Repository To Our Software Sources

Open the Ubuntu Software Center (Applications > Ubuntu Software Center):

In the Ubuntu Software Center, go to Edit > Software Sources...:

Type in your password:

In the Software Sources window, go to the Other Software tab and click on the Add... button:

You are prompted to fill in the APT line of the Firefox 4.0 repository - enter the following line and click on the Add Source button:


You should now see two new repositories on the Other Software tab (one for the Firefox .deb packages and the other one for the source packages). Click on the Close button to leave the Software Sources window:

Back in the Ubuntu Software Center, you should see that Ubuntu package database is being updated (it says In Progress in the left column).

Close the Ubuntu Software Center afterwards.

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10 Comment(s)

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From: AC at: 2011-03-24 16:43:13


This is the wrong PPA to use - it doesn't use stable, it's the **daily** build (it will 'update' Thunderbird, too).  Either pull this article, or edit it to direct people to the proper ppa.  You aren't helping.


is probably what you should be using.

From: at: 2011-03-25 09:42:54

Thanks for the comment, I've just updated the guide!

From: Anonymous at: 2011-04-10 21:23:45

Well AC, good job with the "being a jerk" thing.. This guy wrote an article trying to help people, instead of saying pull the entire article, why don't you just mention that the apt-url is wrong and should be x. instead of saying "Either pull this article, or edit it to direct people to the proper ppa.  You aren't helping."


Not to be an a**hole or anything, Maybe you were just having a crappy day, but I just hate it when people are writing articles to help and someone comes in and rips on it. It's just rude.

From: Gunther Stricke at: 2011-04-03 22:32:13

Parfait. Super tutoriel. Amitiés et pensées de France.


Perfect, Great explaination. 

Cheers from France.

From: at: 2011-03-25 04:09:13

I just did this by following your instructions.  Now using FF4 and it is working just fine.

Thank you.  Much appreciated.


From: Craig at: 2011-03-24 19:17:41

"Please note that the PPA for Ubuntu Mozilla Daily Build Team creates daily packages for various Mozilla projects and branches; therefore it is possible that you will get beta or RC packages (that might not be stable) instead of final packages. "

Considering there are final packages out there - why are you advocating installing from Daily-Builds? 

Most users will receive unexpected updates of non-production ready code which may, likely will, break their system... souring their experience with Firefox, Linux, and Opensource in general.

Please install from final versions (or PPAs with only final fully tested versions)

From: Andson Gomes at: 2011-03-30 19:49:51


    And how you solve the problems with authenticate keys?


From: Andson Gomes at: 2011-03-31 14:05:45

The solution for the problem with the authenticate keys.

$ sudo apt-key adv --keyserver --recv-keys 72D340A3

From: Francisco Santos at: 2011-05-09 18:06:07

Thanks, people!

My Mozilla Firefox 4.0.1 is already running.

Keep doing this nice job!



From: Anonymous at: 2011-04-23 02:16:41