Try these different types of actions:
“Pictures of cats”
“Videos of CES”
“Map of Washington, DC.”
“Directions to The White House.”
“Go to Wikipedia.”
“Listen to Deadmau5”
“Calculate 1 + 1”
“Switch to [tab]”
Or just search for anything
Search
Image Search
Video Search
Maps
Directions
Music
Calculator
App/Site Launcher
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Resetting your Voice Actions options to the defaults cannot be undone!
Voice Actions for Chrome was created by Zachary Yaro.
You can follow Voice Actions for Chrome on Google+.
The source code is available on GitHub.
This extension is still in beta. Your mileage may vary.