Anyone make Chrome Extensions?

Just curious if anyone here makes chrome extensions. I know someone did something for The Verge awhile back.

Anyways I'm desperately wanting an extension that will let me easily center my bookmarks on the bookmarks bar. Really silly that this isn't a feature. If anyone could conjure something up or point me in the right direction (so far I haven't been able to find a real solution to this myself) I would be eternally grateful.