first result for "keyboard navigation" in the chrome-extension-store yields ... "keyboard navigation":
The Keyboard Navigation extension allows you to browse the web without
using a mouse.
How it works: 1) Press the comma key (,) to start. This will show
hints for every link, textbox ... 2) Type a hint. If you typed
correctly, the hint will be highlighted. 3) Press Enter or Return to
"click" on the highlighted element.
if you want control your chrome with your voice only (something i can only assume since you don't make that idiot-proof-clear), maybe something like http://www.chromevoicecontrol.com/index.html could be used in combination with "keyboard navigation".