https://jetpack.mozillalabs.com/
Jetpack is a simple language to write almost on-the-fly Firefox plugins. Pretty amazing technology, looks like css / jquery with some custom methods. Beautiful. Hat tip sfllaw.
https://github.com/PicNet/picnet_closure_repo/tree/master/src/pn/data
Local data store abstraction layer in javascript, tries IndexDB, WebSQL, Google Gears, then localSotrage in that order. Very useful for cross browser data storage.
