Flock is a typical new age browser. Tabs, extensions the works. But it has one built in edge over firefox and i'll go as far to even include internet explorer (7). It has a built in photomanager for photobucket and flickr. Being a user of both web applications I find flock to be one of the most efficient ways to upload and manage images online.
Here's a screenshot of flock with the image manager open

It has drag and drop functionality. Drag your images to the area uptop with the pictures in my screen shot
n it opens up the upload manager where you may set it to resize images or set a dde_script_ion or tags int he case of flickr.
Really wonderful browser n to make things better it uses the gecko engine (same as firefox) so guess what most if not all of firefox extensions work with flock. So you lose non of the extensive features you've grown to love with firefox. I appreciate flock alot Give it a try if you feel like it
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