Zotero is a reference management software and a free Firefox and Google browser extension. Zotero can help users collect, manage and cite research resources, including journals, books and other documents, web pages, pictures, etc.

Currently, Zotero 6.0.19 has been released, and the updated content of this version is as follows:

Feature changes or additions

• Automatic relinking of Mendeley citations(details)
• Add “Any Field” advanced search criteria
• Allow 204 responses to OPTIONS requests from WebDAV servers
• Handle relative PDF links when using a custom PDF parser

Bugs fixed

• Items with annotation attachments are not displayed after moving to trash
• Fixed an issue with downloading attachments from some proxy sites
• Fixed focus being stolen from the item box when switching items via the keyboard
• Fixed clearing active quick searches after annotation changes
• Do not interpret numbers without preceding spaces as page numbers in the Quick Format dialog
• In the Quick Format dialog, don’t try to detect page numbers when pasting
• Fixed freeze in collections/items list when type-to-find wrapped and first row selected

More details can be found at:https://www.zotero.org/support/changelog