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.
  • dstillman Zotero Team
    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
  • dstillman Zotero Team
    Does this happen in Troubleshooting Mode (Help → "Restart in Troubleshooting Mode…”), which temporarily disables all plugins?
  • Thank you for your reply.

    Yes, it happens even in Troubleshooting Mode. I tried to solve it and found a more precise location where the crash occurs.

    Open Zotero and select any collection or 'My Library'.

    Right-click on an item (or select an item and click the label icon in the item pane).

    - Choose a colour from the label colour palette.

    Zotero crashes immediately after clicking the colour (the window closes unexpectedly).

    The following warning appears in the console, but it seems to be unrelated to the crash – it shows up during startup and does not change when the crash occurs:

    1780469503167 addons.xpi WARN Force scan SCOPE_APPLICATION (app-builtin-addons location missing from XPIStates).

    I tried to change "zotero.sqlite" using "sqlite3.exe". I was able to stop the crash by manually clearing the colour column in the itemAnnotations table of zotero.sqlite.

    UPDATE itemAnnotations SET color = NULL;

    After this, Zotero can work without crashing. However, when I try to add colour to the tags, Zotero closes again. Even after removing the colour from the tags, the crash still occurs.

    Please let me know if you need any more information or logs. Color tags are essential for me to highlight my items.

    Thank you in advance for your help.
  • dstillman Zotero Team
    Sorry, we can’t help you if you’ve made manual changes to the database.
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