What version has this? I just tried 12, 13 and 14 (Canary) and I don't have that option. I have "Tab Overview" as the first thing in flags. Is this a Windows only thing, perhaps?
cd /Applications/Google\ Chrome.app/Contents/MacOS
mv "Google Chrome" "Google Chrome Binary"
echo '#!/bin/bash
exec "${0%/*}/Google Chrome Binary" -enable-vertical-tabs "$@"' > "Google Chrome"
chmod ugo+x "Google Chrome"
This let me start chrome with the "-enable-vertical-tabs" command line switch. Once it was started I needed to right click a tab and choose "Use Side Tabs". /Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome -enable-vertical-tabsI believe so, I've been using sidetabs since they were released in Canary one year+ ago and I've never figured out how to get it to work on my Mac