Comment 0 for bug 1688551

Impact
======
gnome-shell provides a browser plugin so that users can manage GNOME Shell extensions by visiting https:/extensions.gnome.org/ in Firefox and compatible browsers.

This extension will stop working in Firefox once users upgrade to Firefox 54. Firefox 54 is scheduled for upstream release June 13, 2017 and 54 Beta has been available since April 19th.

chrome-gnome-shell version 9 adds Firefox support that will keep working in Firefox 54 and beyond.

There are actually two parts to chrome-gnome-shell: a system helper and a browser addon. The chrome-gnome-shell package provides the system helper. The browser addon can be installed directly without admin privileges from
https://addons.mozilla.org/en/firefox/addon/gnome-shell-integration/

or for Chrome at
https://chrome.google.com/webstore/detail/gnome-shell-integration/gphhapmejobijbbhgpjhcjognlahblep

For more details, see
https://blogs.gnome.org/ne0sight/2016/12/25/how-to-install-gnome-shell-extensions-with-firefox-52/

Test Case
=========
- In Ubuntu GNOME, install the updated chrome-gnome-shell
- Open Firefox and browse to https://extensions.gnome.org/local/
- In the list of extensions, turn on the "Applications Menu". The Activities button in the top left of the screen should now read Applications and show a menu of installed apps when clicked.
- Turn off the "Applications Menu". The Applications button should revert to being a simple Activities button.

* Repeat the above test with chromium-browser

* If you are using Firefox 53, that test was just testing the old functionality (It's important that it still works though!). To test the new version:
- Install https://addons.mozilla.org/en-US/firefox/addon/gnome-shell-integration/
- To make sure that you aren't testing the old functionality, run
sudo rm /usr/lib/mozilla/plugins/libgnome-shell-browser-plugin.so
- Restart Firefox and do the above "Applications Menu" test.

- When you are finished testing, run this command to restore the manually deleted file:
sudo apt install --reinstall gnome-shell

Regression Potential
===================
It's important that installing the Firefox helper does not break the existing Firefox support for https://extensions.gnome.org/

Other Info
==========
chrome-gnome-shell 9 is available in artful. We want to make version 9 available in -updates for 16.10, 16.04 and 17.04 to ensure no regressions when updating to firefox 54.

https://wiki.mozilla.org/RapidRelease/Calendar