John Dunning’s FlickrFire enables you to upload the image you’re currently working on to Flickr, without ever leaving Fireworks.
The first time you run the command, it will open a browser page to Flickr where you can give FlickrFire authorization to upload images to your account. After doing that, come back to Fireworks and click the “I’ve Authorized FlickrFire” button. The token that Flickr sends back will be stored in the Fireworks preferences, so you won’t need to re-authorize the next time you want to use FlickrFire. If you ever want to revoke authorization, just go to the App’s You’re Using page on Flickr and remove the permissions from FlickrFire.