Thank you all for your support. I am not very good at the vocabulary of computing. It seems my firefox has changed? I have the new toolbar on the left with the ability to click the star and add to my bookmarks. I have the download arrow and the house (home) button, but my 3 bar menu will not open. I have Windows 8.1 on a ASUS laptop with Firefox 31? I have reset Firefox? I don't understand 'safe' mode. But, the problem still stays. I want to be able to customize Firefox from the dropdown menu button. Thanks Ollie