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

I just upgraded to Firefox 5 to find out that Selenium does not work on it. I'd like to downgrade to Firefox 4 but haven't found a way to do this.

How do you downgrade to Firefox 4 on 11.04?

Thanks in advance.

share|improve this question
up vote 6 down vote accepted
  1. Start "Synaptic Package Manager"

  2. Type in "firefox" in the quick filter and highlight it in the search result (the one w/ the green box next to the package name indicating that it is already installed on your computer)

  3. Select from the menubar "Package" -> "Force Version"

    Package Force Version

  4. Select 4.0 from the dropped down list "4.0+nobinonly-0ubuntu3 (natty)" and click "Force Version"

    Force Version

  5. "Apply" changes


share|improve this answer
+1 downgrading from 9 to 7 works. THX! – Igor Parra Jan 12 '12 at 22:30

you can install firefox with repository .

and download firefox from and run it .

Download Firefox from the Firefox download page to your home directory.
Open a Terminal and go to your home directory: cd ~
Extract the contents of the downloaded file:tar xjf firefox-*.tar.bz2
Close Firefox if it's open.
To start Firefox, run the firefox script in the firefox folder. 


Firefox should now start. You can then create an icon on your desktop to run this command.

share|improve this answer
This would be best if I were to open them normally (ie. clicking a button to launch the browser). However, since I'll be using Selenium which programmatically launches the browser, I'm afraid I'll need to remove FF5, and install FF4 to keep this simple. Thanks! – Ramon Tayag Jun 22 '11 at 4:45
I ended up using this method, thanks. I couldn't find a link to download FF4.0 in, so I just URL-hacked it. I changed 5.0 to 4.0 in the FF 5.0 download URL. Then, so that the system launches 4.0 instead of 5.0, I unpacked it into /usr/lib/firefox-4.0 and made a symlink /usr/lib/firefox ~> /usr/lib/firefox-4.0/firefox. – Ramon Tayag Jun 22 '11 at 6:59

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.