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I'm trying to install some GNOME Shell Extensions on Ubuntu 16.04 (64bit) from the web site extensions.gnome.org. I'm using Gnome 3.18 with LightDM.

I verified that Firefox has the Gnome Shell Integration plugin enabled, and the extension page loads with the on/off slider correctly displayed.

When I switch the slider to "on", I accept the dialog about installation but then nothing happens. After reloading the page, the slider is still "off". Thus the extension is actually NOT installed and the directory .local/share/gnome-shell/extensions/ remains unchanged.

I read older discussions whereas someone were suggesting to reset GNOME settings to default, as discussed here: How do I reset GNOME to the defaults?, but that did not solve the issue.

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Reset to default
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Have you installed the chrome-gnome-shell package?

From the website:

This extension provides integration with GNOME Shell and the corresponding extensions repository https://extensions.gnome.org You MUST install native connector for this extension to work. [...]

For Ubuntu Linux package is available in the ne0sight/chrome-gnome-shell PPA. To install it, type: 

sudo add-apt-repository ppa:ne0sight/chrome-gnome-shell 
sudo apt-get update
sudo apt-get install chrome-gnome-shell
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  • Yes, I did install that package. It should not affect Firefox though. Anyway, I could actually install some extension but the one I was trying to install from the beginning (namely LightDM Lock Screen, extensions.gnome.org/extension/910/lightdm-lock-screen) is still not installing
    – jack008
    Mar 14, 2017 at 14:35
  • But it does. I have done it in my Firefox and it works now
    – call0fcode
    Mar 14, 2017 at 14:38

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