I'm a big fan of cycling though windows and tabs but keybord-shortcuts for google chrome differ from us-keyboard-layout to de-keyboard-layout
In current Chrome ( Version 56.0.2924.87 ) on german Macbook pro layout Jump to the next open tab
is NOT
⌘ + Option + Right arrowor
⌘ + Option + Left arrow
Jump to the next open tab on german macbook pro layout works by
⌘ + Option + 8or
⌘ + Option + 9
I found this by bruteforce-attacking my keyboard with both hands