When attempting to use the browser extension in any of these three browsers, the same thing happens... If the 1Password app is open, it will flash to the foreground for a second and then disappear. If the app is not open, the browser's chrome flashes, but nothing else happens.
This has been occurring for several months. I've rebooted often, all browsers and 1Password are up to date. I've enabled and disabled various extensions in each browser, same thing.
I've also tried the Chrome beta extension to no avail.
At any given time, the following processes are running:
Not sure where to look next.
1Password Version: 1Password 7 Version 7.0.7 (70007000)
Extension Version: 126.96.36.199
OS Version: OS X 10.13.6
Sync Type: Not Provided