Chrome keyboard shortcuts for German Macbook pro layout

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 arrow
⌘ + Option + Left arrow

Jump to the next open tab on german macbook pro layout works by

⌘ + Option + 8
⌘ + Option + 9

I found this by bruteforce-attacking my keyboard with both hands