Hey barbarajacreman, could you add more details on what is the problem you're having? You lost access to your email? Are you unable to enter the website? Or is it something else?

I was using firefox as my default, now there is such a mixup, I want access my email.

Firefox is a web browser and not something else like a search engine nor a email service.

The only way you can view email in a web browser is to go to the email service webmail site like for example gmail.com