In Firefox 68 the icon appears greyed out and I only get the extension management menu.
Similarly, in Google Chrome Version 76.0.3809.87 (Official Build) (64-bit) I only get a menu when cliking on the extension icon.
I have removed and reinstalled the extension in both browsers twice and restarted the PC after each re-installation.
1Password Version: 7.3.684
Extension Version: 126.96.36.199
OS Version: Windows 10
Sync Type: Families account