I have a desktop computer. I use Yahoo home page but I log on to the web via Firefox. I usually get messages from firefox telling me that there is a new version and to download it. I have done this with firefox 4 several times and the last time I downloaded it and installed it and switched off my computer and then re-started it again just to make sure that firefox 4 had been installed but I have just gone online tonight and got the same message again that I am using an old 3.6 firefox and to download the version 4. Failing all that I have done, I don't know what else to do. Perhaps you can help me please. Jenny Blakeman