Mozilla Corporation announced that users working with Firefox 2, will receive notice to download a third version of the browser.
Notification will look like a window with the promotion of Firefox 3. Users will be able to immediately download the new version, turn off the notification, or ask the program to remind of the possibility later.
After the consent of the user the upgrade to the new version is held automatically: Firefox itself downloads and installs . Then you will need to restart the browser and then the update is completed.