Ask HN: Would this solve FB/Google Contacts issues?

With all the furor about google & facebook email ownership, what I propose is a simple browser plugin that collects and manages facebook data for you while you are on the site. The plugin would grab your friends page urls, emails & other data and save it locally. Then this plugin can be used to reconstruct your social graph outside of facebook (diaspora?), and could be potentially imported into other services.

While I can see the downside, if a user currently has access to your information via your permission they could do this manually, therefore this is entirely within your right as a user. This would simply make the process simpler.

Perhaps someone should build this as if it took off it would simplify the transition to facebook.next

Thoughts?