Again, this is a browser extension... not a blogging client for your desktop. But when setup, ScribeFire can certainly makes it easy/speedup things a bit without a doubt.
*. Very recently they updated to the version 1.7 which brings numerous bug fixes and Addbull monetization support for Bloggers.
*. Supports a lot of Blogging services such as - Blogger, Wordpress, LiveJournal, TypePad, Windows Live Spaces, Tumblr, etc (anything that supports the MetaWeblog or MovableType APIs).
*. Edit/Delete existing posts.
*. Create new posts.
*. Upload pictures.
*. Fully featured post editor (spell check, insert links, Bold/Italic texts, etc).
*. Supports major web browsers such as Firefox, Chrome, Safari and Opera.
Once installed, the setting up process is pretty simple as well. If you want to give it a try, then please visit this official ScribeFire website for more (including downloading links for various web browsers, etc).