I was getting somewhat excited when I read that @lkhrs got parts of the 1P extension working through the beta's.
But I'm sorry to report that in my situation: subscribed 1P user within the EU (so using there EU 1P server) can still not stay logged into the service. I can enter my credentials but after switching websites and clicking the 1P icon in the toolbar to get to the 1P popup to fill a login I get kicked back to the following page while I just logged in.
I tried it with both beta extensions, the one for Firefox and the one for Chrome. Both with same behaviour.
I'm curious if and when the 1P team will come around. I'm following the Orion thread in their community but after messages from @Vlad and me and a few bumps nothing happened there.
Maybe others can chime in with requests and comments:
https://1password.community/discussion/124112/support-for-orion-browser/p7