Gmail is showing "This version of Chrome is no longer supported"

Recently I received this message when I opened Gmail in the Chromium Browser on Ubuntu 14.04 ->

I searched the web and found this article (and many other more) which informed me about the recent Google policy that Gmail will stop supporting Chrome 53 and below. So, I checked the version of the Chromium browser I have installed:

Now I want to upgrade the Chromium browser to one of the latest Chrome versions 55 or 56, but I am not able to do that. The Software Updater is showing me that my PC is updated. So, what to do next?
I know that I can switch to Mozilla Firefox, but I still want to use Chromium.

Solution 1:

You are running Ubuntu 14.04 as to be seen from the 'tag' in your question. This system is about three years old and the repositories provide the chromium-browser 53.0.2785.143 package. So, you should consider to install Ubuntu 16.04 LTS, it provides the chromium-browser 55.0.2883.87 package, which most probably will get updated for some longer time - at least until the next LTS edition gets released.

Solution 2:

You are mixing up Chrome and Chromium. You suggest you want to update to the lastest version of Chrome, but you are showing images that shows you are running Chrominium. They are different browsers. The latest version release of the browsers are not the same. The browser number of Chrome is higher than the browser number of Chromium.

You can download and install Chrome by going to http://www.google.com/chrome/ and browsing to the download option.

Just as your Chromium provides automatic updates, your Googe-Chrome browser will do the same, keeping up automatically updated to the latest features and security updates.

You are running Chrome on your Windows PC, not Chromium. You can have the same version of Chrome on your Ubuntu OS by installing Chrome. This is what you did for your Windows PC.

Note:
The automatic updates (for Chromium) that you reference in the comments are for the repository of your (still supported Ubuntu 14.04). While it's still supported, some of the applications might be outdated,and the updates may not have made it to the official 14.04 repository. For that reason, to have the latest version of the applications that haven't made it to the repository, you would have to install the PPA for that application. This is why you see a link to a PPS for updating Chromium.