Frequent crashes in Zotero 9 when saving items via web extension or editing tags

I've been experiencing frequent crashes with Zotero 9. The crashes typically happen in two scenarios:

- When using the browser extension to save articles/pages to Zotero.

- When editing tags on items in the Zotero library.

The issue persists even after upgrading or disabling all plugins.

I have submitted an error report with the following ID:

Report ID: 1314299172

Steps to reproduce:

- Launch Zotero 9.

- Use the browser extension (Chrome/Firefox) to capture a web article → crash occurs.

- Alternatively, open an existing item in Zotero and try to add/edit its tags → crash occurs.

No third-party plugins are active (or even after disabling/upgrading them), but the crashes still happen.

Please let me know if any additional information or logs are needed.

Thank you in advance for your help.
  • Crash as in there's an error shown in Zotero or as in the Zotero app closes completely?
  • The Zotero app keeps closing completely on its own.

    I've tried restoring it multiple times, but that didn't help.

    I've also reinstalled Zotero many times, and even rolled back to version 7 — still no luck.

    Here’s the error logged by System Event Manager.

    - System

    - Provider

    [ Name] Application Error
    [ Guid] {a0e9b465-b939-57d7-b27d-95d8e925ff57}

    EventID 1000

    Version 0

    Level 2

    Task 100

    Opcode 0

    Keywords 0x8000000000000000

    - TimeCreated

    [ SystemTime] 2026-06-01T09:26:37.0518430Z

    EventRecordID 151064

    Correlation

    - Execution

    [ ProcessID] 4464
    [ ThreadID] 31552

    Channel Application

    Computer Reyna_Ting

    - Security

    [ UserID] S-1-5-21-2720265064-3838608011-3586541225-1001


    - EventData

    AppName zotero.exe
    AppVersion 9.0.4.0
    AppTimeStamp 6864d126
    ModuleName xul.dll
    ModuleVersion 140.10.0.2910
    ModuleTimeStamp 69fb443c
    ExceptionCode c0000409
    FaultingOffset 00000000069fb6ad
    ProcessId 0x8da4
    ProcessCreationTime 0x1dcf1a88fc90e1f
    AppPath G:\zotero\Zotero9\zotero.exe
    ModulePath G:\zotero\Zotero9\xul.dll
    IntegratorReportId d376b851-1103-41f0-b710-3e10708bb03a
    PackageFullName
    PackageRelativeAppId
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