Pretty good for a new browser has it has leapfrogged over Opera, Safari etc which has being around almost forever. I'm personally quite fond of it, it's faster than Firefox (my current favourite), seems more stable. Until recently, one of the main reasons why Firefox users didn't switch over was the lack of extensions and this has recently being remedied!
In Does your library have a Firefox add-on collection? I blogged
about libraries creating Firefox collections of library related extensions.
Currently, there are far fewer chrome extensions, but here are some I found that are library related.
1.Amazon related - Winnipeg Public Library Amazon Search Tool , Suginami Library Search by Amazon
2. EZproxy related - Ohio State University Library Proxy Extension , EZProxy Reload, NUS Library Ez-Proxy (by CX)
EZProxy Reload is a non-library specific version, you can enter your own ezproxy proxy string but is otherwise similar to the Ohio's one
NUS Library Ez-Proxy (by CX) created by a user from my institution - National University of Singapore, offers not only a button that adds the proxy but also offers links to popular physics journals as well as to a specific vol and page of a specific journal
Given that currently most library webpages and subscribed databases don't officially support Chrome yet so it might be premature to start supporting and building Chrome extensions! Still, unofficially such extensions are rather handy. One advantage of Chrome extensions over Firefox's is that the former does not require a browser restart when installing or uninstalling extensions. Creating and modifying extensions also seem to be far easier.