Performancing for Firefox is a Firefox extension which builds a blogging client right into your web browser. Version 1.1 was just released, which fixed some bugs with the MetaWeblog API support so now the extension can post to BlogHarbor weblogs. The software is described by the company:
Performancing for Firefox is a full featured blog editor that sits right in your Firefox browser and lets you post to your blog easiy. You can drag and drop formatted text from the page you happen to be browsing, and take notes as well as post to your blog.
I’m posting this using the Performancing for Firefox extension… Works well, though I’d love to see them replace their rich text editor with the far superior Xinha (check out an example of the Xinha web-based HTML editor here).