how do I downgrade to safe versionof firefox not 16

On 10/11/2012 02:26 PM, NikTh wrote:
> Question #210922 on firefox in Ubuntu changed:
> https://answers.launchpad.net/ubuntu/+source/firefox/+question/210922
>
> Status: Open => Answered
>
> NikTh proposed the following answer:
> On 10/11/2012 01:46 PM, a k zickefoose wrote:
>> New question #210922 on firefox in Ubuntu:
>> https://answers.launchpad.net/ubuntu/+source/firefox/+question/210922
>>
>> how do I downgrade to safe version of firefox that is not rev 16 ?
>>
> If your /var/cache/apt/archives/ are not empty then yes , you can revert
> back to firefox 15.
>
> First do this
>
> cd /var/cache/apt/archives/
>
> Then check the contents with
>
> ls
>
> if you see the version of firefox 15 in there , then install it with
> dpkg
>
> sudo dpkg -i firefox_15.0.1+build1-..blahblahblah.deb
>
> If you don't see it in there then connect to /archives.backup/
>
> cd /var/cache/apt/archives.backup/
>
> ls
>
> I assume would be there.
>
> Good luck .
>
> When you install successfully the firefox 15 , then update manager will
> wants to update the package to 16.
> Keep it back :
>
> echo 'firefox' hold | sudo dpkg --set-selections
>
> You can check the package status with
>
> dpkg --get-selections | grep firefox
>
> Thanks
>
And another thing you must know. May need to revert back and
firefox-globalmenu as well.

firefox-globalmenu is a separate package from firefox itself.
firefox-globalmenu 16 , will conflict with firefox browser 15.

Use the same way to install the previous version of firefox-globalmenu.

Thanks

It worked for me. Thank you so much for providing this answer.

If you do not have the packages in /var/cache/apt/archives/
you can download Firefox 15 from here:
http://security.ubuntu.com/ubuntu/pool/main/f/firefox/
(I guess this is for 12.04/precise)

I suppose you best use packages:
firefox_15.0.1+build1-0ubuntu4_i386.deb
and
firefox-globalmenu_15.0.1+build1-0ubuntu4_i386.deb

Just did what I suggested in the previous post,

It works, but I got the following output:

dpkg: warning: downgrading firefox from 16.0+build1-0ubuntu0.12.04.1 to 15.0.1+build1-0ubuntu4.
(Reading database ... 240631 files and directories currently installed.)
Preparing to replace firefox 16.0+build1-0ubuntu0.12.04.1 (using firefox_15.0.1+build1-0ubuntu4_i386.deb) ...
Unpacking replacement firefox ...
Selecting previously unselected package firefox-globalmenu.
Unpacking firefox-globalmenu (from firefox-globalmenu_15.0.1+build1-0ubuntu4_i386.deb) ...
dpkg: dependency problems prevent configuration of firefox:
 firefox depends on libfontconfig1 (>= 2.9.0); however:
  Version of libfontconfig1 on system is 2.8.0-3ubuntu9.1.
dpkg: error processing firefox (--install):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of firefox-globalmenu:
 firefox-globalmenu depends on firefox (= 15.0.1+build1-0ubuntu4); however:
  Package firefox is not configured yet.
dpkg: error processing firefox-globalmenu (--install):
 dependency problems - leaving unconfigured
Processing triggers for bamfdaemon ...
Rebuilding /usr/share/applications/bamf.index...
Processing triggers for desktop-file-utils ...
Processing triggers for gnome-menus ...
Processing triggers for man-db ...
Errors were encountered while processing:
 firefox
 firefox-globalmenu

I guess that this is a ubuntu 12.10 version of Firefox. But for the time being it works.

Or you can use the archive of binaries of the older version. If you added a PPA the install ppa-purge and use it on the same PPA address you used and it should reinstall the officially packaged one

Thanks NikTh, that solved my question.