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I'm using Ubuntu 14.04 and I use the Perapera Chinese add-on for Firefox. It worked up to version 39, but now in version 40 it just stopped working. So I tried to downgrade to version 39 following this link, where there are two options:

1) Choose from the list here, but I have no idea which of the 11 subversions should I use.

2) Download the only version suggested in the link above, i.e. this.

I chose the 2nd option, but after decompressing the file, I have a 'Firefox' folder with lots of files and executables that don't run, just give an error message:

XPCOMGlueLoad error for file (...)/firefox/libxul.so:
libXcomposite.so.1: cannot open shared object file: No such file or directory
Couldn't load XPCOM.

There's a 'run-mozilla.sh', but 'bash run-mozilla.sh' gives:

run-mozilla.sh: Cannot execute .

I REALLY would like to use Perapera add-on to study Chinese. So, is there an easy way to downgrade to Firefox 39? Thanks in advance.

Rodrigo
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4 Answers4

50

You may have two choice to choose for installing method:

  1. Via Mozilla's ftp site (kudos for @Bhikku for sharing the link !). For example we're going to install firefox 50. First, remove any existing version.

    sudo apt-get purge firefox

    Then run following command to download firefox 50 source code, which comes as .tar file.

    wget http://ftp.mozilla.org/pub/firefox/releases/50.0/linux-$(uname -m)/en-US/firefox-50.0.tar.bz2

    Extract the package.

    tar -xjf firefox-50.0.tar.bz2

    Move firefox to /opt directory.

    sudo mv firefox /opt/

    Create symlink in order to set the new firefox as default.

    sudo mv /usr/bin/firefox /usr/bin/firefox_old
sudo ln -s /opt/firefox/firefox /usr/bin/firefox

  2. Via UbuntuZilla which offer .deb files, to install follow the instruction below.

Remove firefox first : 

sudo apt-get purge firefox

Run following command to download firefox :

32 Bit

wget http://downloads.sourceforge.net/project/ubuntuzilla/mozilla/apt/pool/main/f/firefox-mozilla-build/firefox-mozilla-build_39.0.3-0ubuntu1_i386.deb

64 Bit 

wget sourceforge.net/projects/ubuntuzilla/files/mozilla/apt/pool/main/f/firefox-mozilla-build/firefox-mozilla-build_39.0.3-0ubuntu1_amd64.deb

Install it :

32 Bit

cd Downloads/ && sudo dpkg -i firefox-mozilla-build_39.0.3-0ubuntu1_i386.deb

64 Bit 

cd Downloads/ && sudo dpkg -i firefox-mozilla-build_39.0.3-0ubuntu1_amd64.deb

And firefox should run the 39 version

Quote from ubuntuzilla official wiki page :

This is the home of the Ubuntuzilla project, hosts an APT repository with .deb repacks of the latest official release versions of Mozilla Firefox, Mozilla SeaMonkey, and Mozilla Thunderbird.

Liso
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    Thanks, Liso, it worked. But isn't it a bit strange that this package should reside in 'ubuntuzilla' @ sf.net? I mean, why can't it be @ mozilla.org? How can I be sure that ubuntuzilla is made by the same guys at mozilla, and not by some hackers? – Rodrigo Aug 14 '15 at 01:02
  • I'm pretty sure ubuntuzilla is trusted, since the author just repack the official release by mozilla. – Liso Aug 14 '15 at 01:07
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    If the work is "just repack", then it's still amazing that Mozilla can't do that themselves... – Rodrigo Aug 14 '15 at 11:39
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    http://ftp.mozilla.org/pub/firefox/releases/ – Bhikkhu Subhuti Aug 17 '16 at 13:55
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    @BhikkhuSubhuti Thank you! That feels much safer! – Rodrigo Sep 15 '17 at 12:39
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    @Rodrigo You can also get deb packages from the publishing history in Mozilla's official Firefox launchpad repository: https://launchpad.net/ubuntu/+source/firefox/+publishinghistory – Dan Oct 17 '17 at 09:54
  • Too bad damn thing automatically updates itself from 59 to 71 on second starup... – Klesun Dec 08 '19 at 19:23
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In a terminal run:

apt-cache show firefox | grep Version

You will get a list of available versions like in the list below:

Version: 54.0+build3-0ubuntu0.16.04.1
Version: 45.0.2+build1-0ubuntu1

Install the desired version with:

sudo apt-get install firefox=45.0.2+build1-0ubuntu1

Prevent Ubuntu from upgrading to the latest version:

sudo apt-mark hold firefox
BeastOfCaerbannog
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Žarko Milošević
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    apt-cache show firefox; N: Can't select versions from package 'firefox' as it is purely virtual; N: No packages found – Rodrigo Aug 01 '17 at 20:06
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    This is my preferred method, because it lets me still using the package manager and I plan to use it to go back to the latest version someday soon. Ver. 45 is early enough for us to use with Selenium 2, which is why I'm here. – k-den Apr 10 '18 at 20:53
  • That's definitely the answer I was looking for, thank you! – Pat Lee May 06 '21 at 09:48
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While the normal repository often only contains the latest version for older Ubuntu releases, you may be able to find the previous version with the help of Google.

Generalizing from this blog about Firefox 43 on Ubuntu 12.04, you could search for

https://www.google.com/search?q=firefox+$FF_VERSION+$UBUNTU_VERSION+deb

Then

sudo apt-get remove firefox
wget "$URL"
sudo dpkg -i "firefox-....deb"
sudo apt-mark hold firefox

The drawback is that you won't get security upgrades for Firefox, so this is only a temporary solution.

mivk
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0

This is how I downgraded to Firefox 50 version from version 57.

  1. Go to Firefox Release archive and download a suitable version for you.

  2. Press Ctrl+Alt+T to open the terminal and copy-paste this code:

    sudo apt remove firefox

    To uninstall Firefox current version.

  3. Now, go to the directory where Firefox-.tar.gz( or .tar.gz2) file is kept using the terminal or using file manager. Enter this code( if using the terminal):

    tar -xzf firefox-.tar.gz2

    If using file manager, simply extract the file using the Archive Manager(Look in the context menu).

  4. Open the folder and run the file 'firefox'.

Caution: Don't forget to stop automatic updates in Firefox.

This is the way I did it. Firefox is not installed completely but it still works the way it should. Only the options and the Firefox symbol are not there.

I recommend locking the Firefox in the launcher.

To create a shortcut on the desktop, go to the file and open context menu. Click on 'Make Link'. The file created is to be pasted on the desktop.

Hope this helps!:)

Piyush Aggarwal
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