I am using Firefox for several years. I used recently Firefox 46.0, then suddenly it was upgraded to version 46.01. At first it works, then crashed, then I had to press Enter to get on web sites I tried to reach, then no more reaching of any website. I tried to re-install version 46.01, but after download, when trying to install, I get message cannot create a Temp folder, and it fails. I shifted back to version 46.0, but still need to press enter when putting a web address before connecting in it. What's wrong? I use Windows 7/ 64bits. Claude