My primary responsibility for Firefox 2 was to implement support for microsummaries. It was a large task, and I couldn't have done it without significant assistance from a number of other folks.
Mike Connor and Mike Beltzner saw the potential early on and encouraged me to work on microsummaries for Firefox 2. Both also helped in innumerable other ways, including code, user experience, and nomenclature reviews.
Mike Shaver provided invaluable early feedback, including coming up with the name "microsummary".
Ben Goodger and Brett Wilson helped me navigate the treacherous waters of the bookmarks code (and the gentler shoals of Places) to get the architecture and integration points right.
I'm extremely appreciative of the many hours Boris Zbarsky spent working through complicated technical issues with me, particularly how to download and parse an HTML page in Firefox without any front-end impact. Boris was incredibly helpful, and I've seen him do the same for many other developers. He's a real credit to the community.
Much props to Jonas Sicking, Dan Veditz, Darin Fisher, and David Baron for their thorough security review.
Eric Shepherd rocked the docs on many levels (writing, reviewing, organizing).
A veritable bevy of coders contributed patches: Dietrich Ayala, Simon Bünzli, Regis Caspar, Justin Dolske, Kevin Gerich, Pam Greene, Adam Guthrie, Joey Minta, and Phil Ringnalda.
And many other folks made microsummaries better by contributing bug reports, suggestions, microsummary generators, integration into blogging tools, and prototypes of future enhancements/add-ons.
Thank you, everyone!
(And apologies to those whose contributions I forgot to mention.)