A new version of the extension was published to the store and will become available soon.
Starting a new thread because the original grew too long.
Old one is here for reference http://zezo.org/forum.pl?tid=6113
Quick instructions for new users:
1) Install the extension
2) Go to the game home page
3) Click the Z extension icon in the toolbar
4) DO NOT close the debugger warning banner
5) Enter a race to force update of boat position
6) Wait few minutes to get the second table populated with new data
How to deal with the debugging banner:
It can be disabled, but that may not be good idea from privacy/security standpoint. Not because we'll steal your data - we won't, but because some other extension you install could do it.
Ideally you should be running second Chrome instance (or Opera with "Download Chrome Extension" installed) and only disable the warning there.
To disable the warning go to chrome://flags/#silent-debugger-extension-api
ChangeLog in next post.