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→Browser / Front End
** Rob Strong's been looking at [http://blog.mozilla.com/rstrong/2009/12/23/firefox-javascript-component-startup-costs/ performance of various front end components], and has also started looking at a [http://blog.mozilla.com/rstrong/2010/01/08/status-update-week-of-18/ slate of improvements] to the way we handle updates.
** Marco landed the work in {{bug|520165}} that moves history expiration off of the main thread, and in the process moved a bunch of C++ to JS and cleaned up a lot of the older Places code. This provides snappiness and shutdown performance benefits.
** Progress on a new Places query API ({{bug|522572}}), and it's its integration with Jetpack.
** Progress on Places queries in content pages ({{bug|529605}}).
** Started moving session restore to mozStorage ({{bug|508740}}).
