Try Chrome Apps Without Installing Them in Chrome Beta
If you want to try out apps on Google Chrome's Web Store, you have to download/install them and only then do you get to try them. But Venkat at Techdows discovered a neat trick for users of Chrome Beta, Dev, or Canary users that lets you launch apps without installing.
A new setting introduced in the beta version, "ephemeral apps" is the key. Here's how to get it:
1) Visit chrome://flags/#enable-ephemeral-apps in address bar
2) Click Enable button, restart browser.
Once you do that, just type the name of any app in the Chrome App Launcher and you will find two buttons next to it: Add and Launch. Hit Launch to run the app without installing.
Try Chrome Apps Without Installing | Techdows