For about 2 months 1Password has not recognized any extensions in my current browser, I am only ever presented with a "Install the 1Password Extension" view. I noticed the problem start at the very close to the same time in Chrome and Firefox Developer Edition. I just installed Firefox and the 1Password extension tonight and it still does not recognize that extension either. I'm currently on Chrome-74.0.3729.169, Firefox Dev-67.0b19, and Firefox-67.0.3. The 1Password extension is at 126.96.36.199 for both browsers.
I tried installing 1Password X in Firefox Dev, and that works correctly, though the shortcut doesn't always work to bring up the interface.
I have tried removing and re-adding the add-on, disabling and re-enabling the extension, restarting my browser, restarting 1Password, restarting the 1Password Extension Helper, and restarting my Macbook. My next steps will be to uninstall and re-install 1Password, but that is significantly more inconvenient to do as I use 1Password for work.
1Password Version: 7.3
Extension Version: 188.8.131.52
OS Version: 10.14.3
Sync Type: 1Password