Adding extension to new browser, leads to login loop... (Zen/Firefox Browser)

I've solved it. (But it is absolutely a bug, and should be fixed)

One thing that might be related to this bug is that , like I mention, I use 1password.eu , but every time I press the plugin, the webpage for logging in to 1password.com opens. This is confusing, I'm already logged in! I have a tab open where I see my vault! 

So I'm at the absolute beginning of this issue, and this support ticket. So I change to 1password.eu, log in, do the dance, and now I'm greeted with my vaults in a new tab. But again, the 1password plugin has a lock on it and is not logged in. The plugin doesn't recognize me changing to 1password.eu

So what I did was
- Have the plugin installed
- Do not click it to log in
- Go to google
- Search for 1password.eu 
- Find https://my.1password.eu/home
- Login here
- Plugin Popup adding the account comes up
- Plugin unlocked. 

But this is not how I think anyone wants this to work.