Mozilla Labs updated its F1 link sharing extension.
Using F1, users can send links using Twitter, Facebook, Gmail and other services with Firefox.
The new version has a new UI.
The first iteration of F1 had a horizontal layout that stretched across the width the browser.
"This worked well enough for a simple user interface," Mozilla said, "but quickly became awkward when we tried to add more service specific functions. A vertical layout was more appropriate; it kept the line length of your text readable, allowed more space for direct messaging UI, and the doorhanger UI was less intrusive."