v1.0.2

Fix: Zotero 9 installation incompatibility

This release fixes the "could not be installed" error on Zotero 9.

Root causes fixed

1. Plugin ID format — The old ID extra-columns@zotero-plugin used a single-label domain (zotero-plugin) which Zotero 9's stricter Gecko validation rejects. Changed to extra-columns@useroption3.github.io.

2. chrome.manifest removed — Zotero 9 no longer supports the old-style chrome.manifest file in XPIs. Chrome package registration is now done via aomStartup.registerChrome() in bootstrap.js (the modern approach used by Zotero 9-compatible plugins).

Other improvements

• Chrome registration failures are now logged via Zotero.logError instead of silently ignored.
• shutdown() is now wrapped in try/catch to guarantee the chrome handle is always released.

v1.0.1

Fix compatibility with Zotero 9: use zotero application key in manifest instead of gecko

Extra Columns v1.0.0

Initial release

Zotero 7 plugin that exposes key: value pairs from the Extra field as sortable, toggleable item-list columns.

Features

• Define column keys in Edit → Preferences → Extra Columns
• Columns appear in the item list and support sorting
• Keys matched case-insensitively
• Changes take effect immediately (no restart required)

Installation

1. Download extra-columns-1.0.0.xpi below
2. In Zotero: Tools → Add-ons → gear icon → Install Add-on From File…
3. Select the .xpi file and restart when prompted