Using Fedora 29, Firefox 66, with the 1Password X extension. The extension works fine if unlocked, but when locked it's unable to be directly unlocked. Clicking the extension briefly shows the extension window, but it disappears almost right away. It unlocks fine if I log in to my account on 1password.com, but it seems like I shouldn't have to log in to a website to unlock an extension that's supposed to be able to unlock itself.
This has been going on for over a month now, and 1Password X has updated at least once in that time. It also happens on a fresh Firefox profile: create a brand new profile, change nothing, install 1Password X, log in, lock, try to unlock, it fails. So whatever this is, it's happening with a pristine Firefox profile as well as my normal profile.
In the browser console, every time I click the extension icon I get this error:
Unchecked lastError value: Error: Could not establish connection. Receiving end does not exist. Rx moz-extension://dd7c4c76-651e-444d-af9b-2799c266e2e5/background/background.js:31
1Password Version: 1Password X
Extension Version: 1.14.3
OS Version: Fedora 29
Sync Type: 1Password X