This in FF 45.0.2 Show the menu bar (right click in the top window frame and tick 'menu bar>) if it's not there. Choose 'Help>Firefox Help' In the box 'search mozilla support' type 'Zoom feature' and press search. All is explained (I hope)
By clicking on the User Name, you will requery the forum for that user. You will see everything that he or she has posted with that Mudcat name.
By clicking on the Thread Name, you will be sent to the Forum on that thread as if you selected it from the main Mudcat Forum page.
By clicking on the Subject, you will also go to the thread as if you selected it from the original Forum page, but also go directly to that particular message.
By clicking on the Date (Posted), you will dig out every message posted that day.
sj