Many thks to Lord of the Rings for prompt and detailed reply. MUCH APPRECIATED.

Have just checked my Firefox version, which is 31.0 and confirmed to be up to date.

Re: the gmail problem. When I open gmail with "Open Link in NEW WINDOW" all goes well. The problem arises when I receive an email carrying a message "Click here to watch". It is then that the page immediately jumps back to the GOOGLE HOMEPAGE, and I have to return to gmail and start the process all over again, sometimes even three times!. Hope this makes the matter clearer now.