For browser-based presentations and other uses, it is useful to control browser navigation from outside the browser. This Applescript can be run from the command line or even other scripts (e.g., a python daemon that receives remote events) to send arrow key events to the currently active Chrome window. Optionally specify "command" to send a com…

chrome_navigate.scpt

#!/usr/bin/osascript

on run argv
  
	set browser to "Chrome"
	
	set leftKey to 123
	set upKey to 126
	set downKey to 125
	set rightKey to 124
	
	set usageString to "Usage: chrome_navigate.scpt [command] left|right|up|down"
	
	if (length of argv = 1) then
		set keyName to item 1 of argv
		set commandDown to 0
	else if (length of argv = 2 and item 1 of argv = "command") then
		set keyName to item 2 of argv
		set commandDown to 1
	else
		return usageString
	end if
	
	if (keyName = "left") then
		set keyCode to leftKey
	else if (keyName = "right") then
		set keyCode to rightKey
	else if (keyName = "up") then
		set keyCode to upKey
	else if (keyName = "down") then
		set keyCode to downKey
	else
		return usageString
	end if
	
	tell application browser
		activate
		tell application "System Events" to tell process browser
			if (commandDown = 1) then
				key code keyCode using {command down}
			else
				key code keyCode
			end if
		end tell
	end tell
	
end run