Hey @Jeju,
Thank you for bringing this to our attention.
I have done some testing on this website are you're right, 1Password is having a hard time filling the fields in Firefox. I have filed an issue with our development team to see if we can improve the behaviour in a future update.
I did, however, find I was able to fill the fields in Chrome after manually saving my login using the steps below:
- Go to the log in page
- Manually enter your log in details but don't click enter or sign in.
- Right click the 1Password icon in your browser toolbar and choose 'Save Login'
- Give it a title and click Save.
- Now refresh the page and see if you are able to fill.
Can you give this a try and let us know how you get on?
ref: dev/core/core#23398