We are excited to announce the release of Zotero 2.1. Zotero 2.1 is a major update over 2.0, offering many new features and bug fixes, including:

• Firefox 4.0 compatibility¹⁾
• A next-generation citation engine
  • citeproc-js, written by Frank Bennett
  • Supports CSL 1.0 styles and includes many new features and bug fixes
• Improved word processor integration
• Support for displaying Zotero as a Firefox tab
• A customizable Locate menu
• Improved performance

See the changelog for a complete list of changes.

To install Zotero 2.1, click the “Download” button from the front page of zotero.org. You can install Zotero 2.1 over existing 2.0 versions. Zotero 2.1 requires Firefox 3.6 or Firefox 4.0.

Zotero 2.1 requires new word processor plug-ins for Word and OpenOffice word processor integration.

Warning: Use of Zotero 2.1 with your Word and OpenOffice documents will irrevocably upgrade them, and you will no longer be able to use them with Zotero 2.0 releases.

• Install the Word for Windows Plug-in for Zotero 2.1 (Firefox extension)

1. Install PythonExt:
   • Firefox 3.6 users: PythonExt from zotero.org (Firefox extension)
   • Firefox 4.0 users: PythonExt from zotero.org (Firefox extension) Requires Mac OS X 10.6 “Snow Leopard” or later.
2. Install the Word for Mac Plug-in for Zotero 2.1 (Firefox extension)

• Install the OpenOffice Plug-in for Zotero 2.1 (Version 3.5a1) (Firefox extension)

This revised OpenOffice.org/NeoOffice/LibreOffice plug-in should fix the vast majority of installation issues experienced with older OpenOffice.org plug-ins. This newer plug-in is not yet compatible with Zotero Standalone, and integration will no longer work in Zotero Standalone after it is installed. For Zotero Standalone users, or those experiencing problems with the new plug-in, the older OpenOffice Plug-in for Zotero 2.1 (Version 3.1b1) is still available for download.

See the troubleshooting page if you run into problems.