ScribeFire is the blogging addon I use to post my blog post from my browser. This is an addon for Firefox. I’m using it for a long time. It used to be called Performancing and later changed to ScribeFire. The initial versions missed some of the features that would have been quite useful while posting, but they kept improving and have added lots of those missing features. ScribeFire 2.0 takes it to the next level with the following changes:

• Tabbed editing of posts, so you can open multiple posts or notes at the same time
• Added the Quickblogging feature for easy modification of existing blog posts.
• All users can now set the timestamp of their posts, not just those using Firefox 3
• Fixes to the account wizard make for a better account setup experience
• A cleaner layout: the left sidebar has been shrunk and the
  Delicious/Technorati functions have been combined under a new
  “Share/Promote” tab that also helps you submit your posts to social
  bookmark sites.
• Fixed YouTube embedding for Blogger users
• Added custom ping URL option
• Added easy YouTube and Flickr integration
• Major fixes for using ScribeFire in its own tab or window