I would like to build my own extension to due with the google bookmark and chrome bookmark sync.

I gave that up because I found the chrome API didn't provide bookmark interface.

Recently, I found the GBX introduction in this forum and it is doing what I want to do.

Any one know how it works? What kind of API didn't it use to sue with the chrome bookmark? Thanks.

http://code.google.com/chrome/extensions/bookmarks.html