With 2 accounts on firefox I can only sign into 1 at at a time

Hey @chapppie:

Thanks for following up. It sounds like there's a few things at play here. If 1Password in the browser is successfully communicating with the 1Password app, unlocking 1Password for Mac should unlock 1Password in your browser as well. If this isn't what you're seeing, then we can definitely dig in further to improve your state of play.

Additionally, while we'd recommend that you use the same account password for any 1Password accounts you may have, we've recently added a change to the beta version of 1Password in the browser:

Locked accounts are now included in the account list so that you can unlock them right from the pop-up. {#11600}

You can get the beta release of 1Password for Firefox here: https://support.1password.com/betas/#install-a-beta-release-of-the-1password-extension

Let me know how you get on with that!

Jack