Hi Graham Price, This behavior usually happens when Firefox opens an external link in a “fresh” window context where extensions don’t immediately initialize correctly. What’s likely going on is: When you click a link in your email client, it launches Firefox as an external call, and in some cases that window starts before the 1Password (and other extensions) context is fully attached. That results in a window that looks normal but has no active extension runtime, so the toolbar appears empty or unresponsive. This is a known class of issue in Firefox where external links can trigger a separate browser window/session context instead of reusing the existing one, which can break extension injection timing. Things that usually help: * Make sure Firefox is set to always open links in the existing window/tab session (not a new window) * Check Firefox settings in `about:config` for `browser.link.open_newwindow.override.external` and set it to `3` (open in last active window) * Fully quit Firefox (including background processes) and restart after changing extension settings * Disable “Open in new window” behavior in your email client if it has that option * Re-pin or re-enable 1Password in Firefox and ensure it is set to “run in private windows” (sometimes helps reinitialize contexts) Also worth noting: 1Password itself relies on a background script that can fail to attach if the browser window is spawned outside the normal session flow, which matches your symptom where it works fine in all existing windows but not the externally opened one. If it keeps happening consistently, it may be worth testing whether those email links are launching a second Firefox process (visible in Task Manager). That’s often the real root cause.