When loading Firefox Nightly (version 58), the extension icon is nonfunctional and appears greyed out, pulsing the normal color every few seconds, but still not working. The extension works perfectly in Firefox Beta (Quantum, 57). I have tried restarting and using 1Password and extension beta builds; none of these worked.
1Password Version: 6.8.3-BETA1
Extension Version: 220.127.116.11
OS Version: macOS 10.13 Beta (17A362a)
Sync Type: 1Password Account