@feodosij To install the_bo’s version do like this:
wget http://launchpadlibrarian.net/380369885/chromium-codecs-ffmpeg-extra_68.0.3440.75-0ubuntu0.16.04.1_armhf.deb
wget http://launchpadlibrarian.net/380369879/chromium-browser_68.0.3440.75-0ubuntu0.16.04.1_armhf.deb
sudo dpkg -i chromium-codecs-ffmpeg-extra_68.0.3440.75-0ubuntu0.16.04.1_armhf.deb
sudo dpkg -i chromium-browser_68.0.3440.75-0ubuntu0.16.04.1_armhf.deb
sudo apt --fix-broken install
sudo dpkg -i chromium-browser_68.0.3440.75-0ubuntu0.16.04.1_armhf.deb
sudo apt-get purge chromium