I have Chrome Version 35.0.1916.114 on Ubuntu 14.04 and have enabled the Chrome flag 'Enable the App Launcher. Linux'.
How do I get the new features - Google Apps Launcher, Google Now and Google Notifications - to appear?
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To get the Google App Launcher on your Ubuntu Unity task bar:
You should now have a Google App Launcher in your Unity Launcher sidebar that provides a handy shortcut to your most used Google applications. You should also ensure that the Google Chrome browser is set to run in the background so that you continue to get notifications from Hangouts and other applications. To do that, just
Google Chrome notifications settings can be controlled from the Google Chrome browser settings. Instructions for these are outlined on this Advanced Chrome Help topic titled Turn notifications on or off
Launcher is retiring now. For me it's already disappeared in Apps Store.
Check this link
You can install WebCatalog from software center or download it from here or:
sudo apt install webcatalog
Then, start WebCatalog
In the search bar type whatever you want to install.
Linkedin, telegram web, whatsupp, Allo, Microsoft office and etc.
After installing, you can just start it by searching(no need to search it from webcatalog anymore).