Firefox extension opens invisible popup blocking mouse interaction when vault is locked

Environment

• Operating System: Windows 11 Enterprise 24H2 (OS build 26100.7840)

• Browser: Firefox 143.0.1 (64‑bit)

• Enpass Desktop: 6.11.20 (2229)

• Enpass Firefox Extension: 6.11.12.1

Steps to reproduce

1. Lock the Enpass vault (e.g., via auto‑lock or manual lock).

2. Open a website in Firefox that has a login form.

3. Click the Enpass browser icon or try to trigger autofill on the username/password field.

Expected behavior

• The Enpass extension should either:

  • Show a visible login popup prompting me to unlock the vault, or

  • Not open any overlay until the vault is unlocked in the main Enpass app.

Actual behavior

• A popup window appears but is fully transparent / invisible, yet it still occupies the screen area where the unlock/login window should be.

• Mouse interaction in that region is blocked: clicks do not reach the underlying page or form fields.

• The issue persists until I:

  • Open the main Enpass desktop application,

  • Unlock the vault there,

  • Return to Firefox, at which point the extension behaves normally again.

Additional notes

• The ghost/invisible popup does not react to clicks and cannot be closed via the browser UI.

• The issue reproduces consistently on Windows 11 Enterprise 24H2 with Firefox 143.0.1, as long as the vault is locked when the extension is triggered.

Please let me know if you need logs, screenshots, or a screen recording to further diagnose this behavior.

Edited April 17Apr 17 by Deuntje