AppleScript to grab a list of tab titles from Google Chrome.

activate_tab.applescript

# Activate tab
# $ osascript activate_tab.applescript 1, 2

on run argv
  set window_index to item 1 in argv
  set target_index to item 2 in argv

  tell application "Google Chrome" to set active tab index of first window to target_index
  tell application "Google Chrome" to activate
end run

open_tabs.applescript

# List tab titles in Google Chrome windows

set titleString to "
"

tell application "Google Chrome"
	set window_list to every window # get the windows
	
	repeat with the_window in window_list # for every window
		set tab_list to every tab in the_window # get the tabs
		
		repeat with the_tab in tab_list # for every tab
			set the_title to the title of the_tab # grab the title
			set titleString to titleString & the_title & return # concatenate
		end repeat
	end repeat
end tell

results.txt

Result:
"
Hacker News
Product Hunt
Google
"