up vote 58 down vote favorite
14

Just upgraded to Ubuntu 14.04, which seems to also make a full reinstall of Chromium (as all my plugins were removed).

Now, trying to access https://extensions.gnome.org/ to enable Gnome Shell extensions, but the message:

We cannot detect a running copy of GNOME on this system, so some parts of the interface may be disabled. See our troubleshooting entry for more information.

keeps appearing. There is nothing in my chrome://plugins page, but the site still seems to be whitelisted in my "click to play" settings. Has anyone found out how to force Chrome to get this plugin?

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1  
Doesn't answer your question, but I just had this problem. An easy workaround for me was to use Firefox instead. – Thane Brimhall Apr 23 '14 at 5:35
    
Yeah Firefox works for me as well, I just want to know why it doesn't in Chrome anymore. – bak202 Apr 23 '14 at 13:57
up vote 63 down vote accepted

Chrome and Chromium dropped support for the NPAPI plugins (Netscape Plugin Application Programming Interface) in favor of PPAPI (Pepper Plugin Application Programming Interface) so all plugins that use NPAPI (like GNOME Extension plugin) are just not supported.

The only alternative is using another browser that allows them (like Firefox) or asking the developers to move to PPAPI (unlikely).

NOTE: This is the blog post from the Chromium blog mentioning this, titled: Saying Goodbye to Our Old Friend NPAPI.

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5  
I just stumbled into this today, I'm an avid chrome user, this is total BS. Any info on why the drop? – slm♦ Jun 4 '14 at 22:14
1  
More info on this: reddit.com/r/gnome/comments/1wvv60/… – slm♦ Jun 4 '14 at 22:26
    
As a work around there's this scripting solutiont to re-enable your extensions after a crash/update: askubuntu.com/questions/359958/… – slm♦ Jun 4 '14 at 22:28
    
@slm there has been angry users in all bug trackers, but this is the main one – Braiam Jun 4 '14 at 22:44
    
Unconfirmed (as of now) bug report for chromium – ks1322 Dec 23 '14 at 14:52
up vote 5 down vote

You want to install the "chrome-gnome-shell" (and probably also the "GNOME Shell Integration" Chrome Extension)

You can find instructions to install chrome-gnome-shell for your distro here on the GNOME wiki.

Essentially, install for your distro:

And then add the Chrome Extension.

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up vote 0 down vote

Install chrome-gnome-shell depending on your distro and for the first time execute:

/usr/bin/python3 /usr/bin/chrome-gnome-shell --gapplicarion-service

After this the addon from chrome will detect the native plugin.

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up vote -1 down vote

I was getting this error because the plugin package was not installed. Installing it with Yum immediately fixed the problem, although you have to use Firefox because Chrome doesn't support the protocol they are using.

sudo yum install gnome-shell-browser-plugin
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up vote -3 down vote

Try going to chrome://flags/ and enabling Npapi

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5  
This is impossible to do. It's been completely ripped out of the code base on Linux. – Makoto Apr 27 '15 at 20:05

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