Performancing for Firefox

Performancing.com provides a excellent tools for blogging: Performancing for Firefox.

Performancing for Firefox is a full featured blog editor that sits right within Firefox.....

After installing, a small icon of note is showed below window. Clicking it brings a panel containing a WYSIWYG blog editor. It supports blog hosting lilke blogger.com, wordpress.com, typepad.com, livejournal, wordpress custom and moveabletype custom.