I HAVE LOST THE "CLOSE TAB" OPTION WHEN CLOSING A SCREEN THE SYSTEM WILL ONLY CLOSE BACK TO THE DESKTOP? RUSS
When closing a screen I have, in the past, used the File button [top left] this produced the drop down menu, there was the option to "CLOSE TAB", which I used, this closed the screen but left Firefox open, this option has now disappeared, the only way I can close a screen now is to exit back to the Desktop and reopen Firefox.
The menus were changed a bit in Firefox 4, Close Tab can be found by right-clicking on a Tab.
Thanks for the prompt response, unfortunately whilst the solution you proposed works on most tabs when I am down to the last one absolutely nothing I do will get rid of it, at present I cannot close the Mozilla Add-ons Manager tab. I have tried your suggestion followed by clicking the cross in the top right of the screen, I have also tried File and then exit. But when I next click onto the Mozilla icon it returns to the last tab shown on the screen.