sudo apt-get purge firefox
rm -rf ~/.mozilla
sudo rm -rf /etc/firefox/
sudo rm -rf /usr/lib/firefox
sudo rm -rf /usr/lib/firefox-addons
apt-cache show firefox | grep Version
sudo apt-get install firefox=45.0.2+build1-0ubuntu1
sudo apt-mark hold firefox
wget sourceforge.net/projects/ubuntuzilla/files/mozilla/apt/pool/main/f/firefox-mozilla-build/firefox-mozilla-build_52.0-0ubuntu1_amd64.deb
sudo dpkg -i firefox-mozilla-build_52.0-0ubuntu1_amd64.deb
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old verions of chrome
https://www.slimjet.com/chrome/google-chrome-old-version.php
sudo apt-get purge google-chrome-stable
sudo apt-get autoremove google-chrome-stable
http://chromedriver.storage.googleapis.com/index.html
chromedriver chrome
2.46 71-73
2.45 70-72
2.44 69-71
2.43 69-71
2.42 68-70
2.41 67-69
2.40 66-68
2.39 66-68
2.38 65-67
2.37 64-66
2.36 63-65
2.35 62-64
2.34 61-63
2.33 60-62
---------------------
2.28 57+
2.25 54+
2.24 53+
2.22 51+
2.19 44+
2.15 42+
