I always had the 'open new windows in a new tab' UNchecked so links from Outlook would open in a new window and it worked fine. This morning, for some reason, links won't open at all in a new window, either from my email or from any website that is set to open a new window when clicking on a link. If I check the 'open new window in a new tab' everything works fine! But it's not always useful for this to work like that for me, so why has Firefox suddenly stopped opening new windows? For info the links in email turn a different colour once clicked, they still do this but the window doesn't open, there are no error messages, it just doesn't open a window at all! the same applies to links/pages on websites, if that page has been set to open in a new window, Firefox doesn't open it. I'm not a PC whizz so any help in non-tech English would be more than appreciated! == This happened == Every time Firefox opened == This morning!