Chromium 75.0.3770.xx does submit html forms twice

When you have customers which use chromium on Ubuntu 18.04 LTS, then you might see duplicate form posts in your applications.

This is a very nasty bug introduced somewhere between the 74.0.3729.169 and 75.0.3770.80 releases.
Here a few references to the problem, which seems to be still "work in progress"

• https://stackoverflow.com/questions/56488687/duplicate-requests-after-chrome-update-to-version-75-0-3770-80-official-build
   
• https://bugs.chromium.org/p/chromium/issues/detail?id=977882
   
• https://support.google.com/chrome/thread/8616084?hl=en

 This does not help the customers, since we need a solution now, and not in a few days/weeks.

On ubuntu the simplest is to roll back to the last working version 74.0.3729.169

How to do this:

Login in the console of your system(s) and do this:

cd /tmp
rm chromium-*

wget -q http://launchpadlibrarian.net/424897539/chromium-browser_74.0.3729.169-0ubuntu0.18.04.1_amd64.deb
wget -q http://launchpadlibrarian.net/424897541/chromium-codecs-ffmpeg-extra_74.0.3729.169-0ubuntu0.18.04.1_amd64.deb
wget -q http://launchpadlibrarian.net/424897535/chromium-browser-l10n_74.0.3729.169-0ubuntu0.18.04.1_all.deb


dpkg -i chromium-*.deb
rm chromium-*
 
apt-mark hold chromium-browser
apt-mark hold chromium-browser-l10n
apt-mark hold chromium-codecs-ffmpeg-extra


This installs the 74er version and prevents future upgrades to install bad versions.
Of course once a working 75 or 76 release is available, you have to unhold the packages