With today's updates, Canonical upgraded the default web browser to Mozilla Firefox 15.0, in all its supported Ubuntu operating systems.
All Ubuntu 12.04.1 LTS, Ubuntu 11.10, Ubuntu 11.04, and Ubuntu 10.04 LTS users can update their Firefox web browser and Thunderbird email client to version 15.0 right now, by using the Update Manager software.
Other Linux users can download Mozilla Firefox 15.0
binary and source packages right now from Softpedia. Also, don't forget to visit our always up-to-date Firefox Extensions section
for the latest add-ons!