Some of you may not be aware that the Firefox that ships with each Distribution can vary slightly, by the arrangements made between the Distributors and Mozilla, or afterwards, placing their own stamp on things.
The situation Al1000 describes was stock standard under Windows 7 and prior (I do not know about 8 and above), and yes, if you clicked About Firefox it would automatically kick into search for update mode.
Not so for all Linux Distros. In my Linux Mint Mate, for instance, the following applies:
This is a static window and does not vary. Note the reference to Linux Mint.
With my Preferences, the following applies:
Only option is Search Engines, not Firefox itself. I pull down new ones using the apt-get principle, using my update script or my updateme Alias.
But given both Al and brian2009 are using Puppy, I can't likely be of further assistance until I try it out. Regrets.
Just throwing it out there, about the differences between Distros.