Are you trying to sign in at https://accounts.firefox.com/ ?

I can confirm that it is up and working on my end. Barring a misspelled ID or password, I can only think of resetting your password as a fix. Since you just installed, it won't affect Sync.

If you change your password while you have data uploaded in Sync, that data will be rendered inaccessible because the encryption key changes based on your password.

Thank you for the input. Figured out the problem on this end. I still have another problem, but don't know where to post for help yet, so maybe you can help. I cannot access one of the pages on my internet providers site because fox says it doesn't have some sort of security encryption reported to them???? It's just the one page, but it has the information I need on the chat board there and I cannot access it.

Glad I could help.

Do you get the "connection untrusted" page like so: https://support.cdn.mozilla.net/media/uploads/gallery/images/2011-10-19-09-09-25-5809bb.jpg ?

The image is from the following article: https://support.mozilla.org/en-US/kb/connection-untrusted-error-message. The article has generic advice for what to do.

If this is the case, you should start with checking what exactly the problem is under Technical Details, then refer to the article above. In my experience, this is usually due to an address mismatch, https://support.mozilla.org/en-US/kb/connection-untrusted-error-message#w_certificate-is-only-valid-for-site-name, when lazy or careless site designers use their main certificate for an uncertified subsection or affiliated site. You can proceed despite the warning if the certificate seems fine (trustworthy signer, assigned to the site you are using), but the site's webmaster should really fix these flaws in design.

If the site's management refuses to fix their poor design (you sent feedback, right?), you can always add a permanent exception for your browser, https://support.mozilla.org/en-US/kb/connection-untrusted-error-message#w_bypassing-the-warning. This is a poor practice, however, and leaves you vulnerable.