Performancing released a FireFox extension today that allows for blogging right within FireFox 1.5 (via Micro Persuasion). This is impressive stuff. Flock built an entirely new browser based on this concept. All I could think about when I tested Flock was why someone didn’t just write a FireFox extension for this functionality. There are a few polishing touches I’d like to see before I’d use this on a daily basis (primarily the ability to specify draft vs. publish status on a post), but this is amazingly useful. Good job guys.