chromiumfirefoxgnome-shellgnome-shell-extensiongoogle-chrome
I upgraded my Dell Optiplex 9010 to Ubuntu 18.04 from Ubuntu 16.04. None of my GNOME web-browser-extensions (used for managing and installing extensions) work, neither the ones I have installed on Chromium, Chrome, or Firefox.
This has only been the case since my upgrade from 16.04 to 18.04.
This is what I see in every browser I open the URL on:
Although GNOME Shell integration extension is running, native host connector is not detected.
How can I fix this?
You have to install native connector
sudo apt-get install chrome-gnome-shell
You don't need to install GNOME extensions from extensions.gnome.org. In 18.04 and later it's more convenient to install GNOME extensions directly from Ubuntu Software.
In Ubuntu 18.04 and later GNOME Shell Extensions can be installed from the Ubuntu Software app. Do a keyword search for "GNOME shell extensions" and the type of app you are searching for.
You can also search from all of the available GNOME Shell Extensions on the same screen by pressing Add-ons button which is located under the Categories heading. In the Add-ons screen select the Shell Extensions tab and you will see all the available GNOME Shell Extensions.
Clicking on a GNOME Shell Extension in the list of search results will bring up its screen which will often show screenshot(s).
Clicking on the Website button will open its website in a web browser where you can view a larger sized image of the same screenshot that was shown in Ubuntu Software.
Clicking on the Install button will install the extension.
Best Answer
You need to install
chrome-gnome-shellpackage so that your browser can detect your running GNOME Shell version. To install it runNote: Installing GNOME Shell extensions doesn't work with the snap versions of the browser applications. Also since the 19.10 release, Ubuntu offers only the snap version of Chromium, the apt version of Chromium is not available in the standard repos.