We are excited to announce the release of Zotero 4.0. Zotero 4.0 is a major update over 3.0, offering many new features and bug fixes, including:

• Tag colors
• On-demand download support
• Relative path support for linked files
• Automatic style updating for all installed styles
• Automatic journal abbreviation support
• Firefox 20 compatibility (Zotero for Firefox)
• …plus much more.

See the 4.0 changelog for more details and a complete list of changes.