I'm unable to activate the extension on Firefox when a http basic authentication modal is visible.
This 1password icon can't be clicked: https://i.imgur.com/FnuXF6x.png
Firefox developers said that it's a thing 1password extension devs can fix using the WebExtensions API:
I can reproduce the bug on macOS and Windows 10.
Steps to reproduce:
1) Open Firefox
2) Open a site which has basic authentication modal, like this test site: http://httpbin.org/basic-auth/user/passwd
3) Try to click 1password extension on the browser, next to the URL bar.
1Password Version: 6.8.2
Extension Version: 184.108.40.206
OS Version: macOS
Sync Type: Not Provided