While Epiphany is the default browser of GNOME, and it’s a great browser (I use it from time to time), Firefox is still my brower of choice, especially since it’s so extensible.
How to get the code
1. Clone git://git.mymadcat.com/tracker-firefox
2. Generate the XPI with git archive --format=zip HEAD > tracker-firefox.xpi and install it in Firefox
3. Get the needle-bookmarks branch of tracker (hopefully merged into master soon) from its git repository
4. Search your bookmarks
I think it would be interesting to extend the plugin to add a history observer that would log events to Zeitgeist… Zeitgeist already has a Firefox plugin, but unless it has been fixed since last time I checked, it’s not working with Gecko 2. We’re in any case working more and more together with the Zeitgeist guys to make sure the Gnome 3.1 search experience will be greatly enhanced!