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Yesterday my Firefox was upgraded from 12 to 13 and I downgraded it back following this, specifically 12.0+build1-0ubunut0.11.04.1 not 4.0+nobinonly-0ubuntu3 (natty). Besides the new version 13, there was only one other selection, my previous version 12. Today, Firefox got upgraded again and so I followed the same steps but instead of version 12(there was only one other version besides 13 again), it must have been version 4 because my Firefox is now version 4 and there isn't the version 12 selection.

How do I get back to the version 12 I had? I don't want 13(some things break on it) and definitely don't want version 4. Thanks!

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1 Answer 1

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First remove the firefox installed on your pc by typing in terminal
sudo apt-get remove --purge firefox

Then download these packages (from the official firefox ppa).
I have assumed that you have natty.

For 32 bit

firefox 12 main

firefox mozsymbols

firefox locale_en

firefox gnome support

firefox global menu

firefox branding

For 64 bit

firefox 12 main

firefox mozsymbols

firefox locale_en

firefox gnome support

firefox global menu

firefox branding

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@Ashu Hi, I think I found it only the main so far, but when I tried to install it, it says: Error: Breaks existing package 'hunspell-en-ca' that conflict: 'iceweasel'. But the '/home/jc/Downloads/firefox_12.0+build1-0ubuntu0.11.04.1_amd64.deb' provides it via: 'gnome-www-browser,iceweasel,www-browser' and won't let me install –  Jenny Carter Jun 7 '12 at 17:22
    
@Ashu I have already removed firefox, is there a specific order of installation? –  Jenny Carter Jun 7 '12 at 17:29
    
try this sudo apt-get remove --purge iceweasel –  Ashu Jun 7 '12 at 17:33
    
also put all the files in one folder then cd into the folder and type dpkg -i *.deb –  Ashu Jun 7 '12 at 17:34
    
Hi, I appreciate your help. I put them all in one folder and ran the command, now I am getting: Errors were encountered while processing: firefox-gnome-support-dbg, Package firefox-dbg is not installed. –  Jenny Carter Jun 7 '12 at 17:39
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