Problem in Firefox Browser

[Lucky Donegan]

I am a new convert to Linux and I am using ubuntu 5.0 and have a new copy
version enroute to me but this problem I am tryiing to resolve.

The problem with Firefox browser is when you go say into a website or click
on a link it throws one out of the site your at such as Yahoo's email area.
Once clicked on the email it immediately exits out of the Browser mode.

Is there a setup or preference that is checked or set that I may not be
aware of that needs to be changed that I can do to make this right so it
does not do this further.?

Thank you

Lucky Donegan  C.I.S.   Ph.D.
PC Systems, Software Engineer