Fix Duplicated Icons in Plank/Docky

I ran into duplicated Chrome icons with Plank on Ubuntu, and here's the solution I found: http://kb.openstudioproject.com/content/fix-double-google-chrome-icon-docky-and-plank

In short,

  1. Open /usr/share/applications/google-chrome.desktop with root permissions.
  2. Under each section ([Desktop Entry], [NewWindow Shortcut Group] and [NewIncognito Shortcut Group]), add the following code: StartupWMClass=Google-chrome-stable
  3. Save.

If you are using Plank, you're good to go. If you're using Docky, you need to clear cache and restart Docky.

That line of code, is designed just for such cases, especially for Java applications. Whenever you run into such cases, you should find out the right WMClass and assign them in .desktop manifest files.

Alternatively, you can use the following one-liner

sudo sed -i '/Group\]\|Desktop Entry/a StartupWMClass=Google-chrome-stable' /usr/share/applications/google-chrome.desktop  

References

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