Well, it took a few months, but Yahoo on Wednesday caught up to Firefox 3 with a beta plug-in for its Delicious bookmarking service.
The Firefox add-on for Delicious "now has full Firefox 3 support while retaining Firefox 2 compatibility," said Nick Nguyen, senior product manager for Delicious, in a blog posting.
Delicious lets people save their bookmarks online, tag them with descriptive keywords, and share them with other Delicious members.
Firefox has a wealth of plug-ins to extend its abilities, but several don't work on Firefox 3, which is still in beta. Delicious is one very widely used tool, so the new plug-in should help lower barriers significantly.
The new plug-in also has a handful of features. None struck me as major, though the low-profile "classic mode" sounds promising; check the blog for a list.