Did you search for similar issues before submitting this one?
Yes

Describe the issue you encountered:
When attempting to log into a website (ex: github.com) I tried to use 1Password after setting the preference in Brave. 1Password did not fill the form and after copying the password into the form, Brave offered to save it. If I chose yes, it was saved into about:passwords.

Expected behavior:
If I choose 1Password to manage my passwords, it should fill the login form and Brave should not offer to save the password.

• Platform (Win7, 8, 10? macOS? Linux distro?):
  Tested on OS X
• Brave Version:
  0.12.0
• Steps to reproduce:
  1. Visit a site for which you have a 1Password login available
  2. Set 1Password as your password manager in Brave
  3. Attempt to log in
• Screenshot if needed:
• Any related issues: