My good friends over at Flock HQ have updated the developer preview of their Firefox-based browser to version 0.5.11. I've talked about Flock several times in the past, including my comprehensive review. For those of you that have never heard of Flock, it's a browser aimed at Web 2.0 gurus and bloggers. The release notes show impressive improvements to the features line-up. The code base seems to have been sync'd with Firefox 1.5 via the inclusion of the auto-update feature. However, the big name feature for me is importing bookmarks from Firefox, which you weren't able to do in previous versions. If you haven't used Flock before, now might be the time to download it, especially with things like the improved Flickr integration and upgraded blog engine.