Review Chrome Web Request API
The Google Chrome people have a proposed web request API that is going to be implemented RSN. It lives here: http://www.chromium.org/developers/design-documents/extensions/notifications-of-web-request-and-navigation. It needs some review to make sure it will be suitable for Torbutton and other privacy enhancing addons.
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information