I set a primary password yesterday but it is not working, help!

What is not working? Can't you use your primary password to check your saved passwords?

If yes, you have to find out your primary password unless you have synced your saved logins to another device.

https://support.mozilla.org/en-US/kb/reset-your-primary-password-if-youve-forgotten-it

Yes it doesn't let me access saved passwords, but as it was only set yesterday I am sure it is correct. I am reluctant to reset it as I will loose all the saved passwords, is that my only option?

You can try your primary password again. Maybe it is just a shift key or something.

Thanks, I've been trying shift keys,, with no luck so far. I've seen at least one other person having the same problem, so am wondering if there was a problem with the latest version of Firefox.