I responded to a Firefox email which resulted in my changing my theme by mistake. I wanted to change it back. That was about three hours ago. I tried to login to my account using the username, email and password I had written down for Firefox. They weren't recognised. I asked for a password reset. No email arrived on either of my email accounts. I checked the junk folders. I requested to register a new account on Firefox. I was told an email would be sent. No email has arrived. All I want to do is change the theme back to what it was because I can't read my tabs or horizontal menu items because of the colour scheme. I've read several troubleshooting suggestions but none seem to properly apply.