I did not get it automattically, takes considerable time to roll out, but you can force the update from inside the fx settings manually.
.# At the top of the Firefox window click the Firefox button, go over to the Help menu and select About Firefox.At the top of the Firefox window click the Help menu and select About Firefox.Click the menu button New Fx Menu , click help Help-29 and select About Firefox.On the menu bar click the Firefox menu and select About Firefox.

The About Firefox window will open and Firefox will begin checking for updates and downloading them automatically.

When the updates are ready to be installed, click Restart to Update.

pol