I tried using Zotero on scientific journal sites such as PLOS, Nature,Science, Elsevier’s Science Direct and it works perfectly. I have tried all their claimed features and they work seamlessly. When compared to commercial equivalents like Endnote and R
Zotero [zoh-TAIR-oh] is a free, easy-to-use Firefox extension to help you collect, manage, and cite your research sources. It lives right where you do your work — in the web browser itself. Features Automatic capture of citation information from
CiteSpace analyzes relationships among authors, publications, and citations. Using a "social networking analysis" sort of approach, visual mapping is provided to enable researchers to find relevant pubs, and to enable pharmaceutical and biotech firms to
WebCite®, a member of the International Internet Preservation Consortium, is an on-demand archiving system for webreferences (cited webpages and websites, or other kinds of Internet-accessible digital objects), which can be used by authors, editors, and publishers of scholarly papers and books, to ensure that cited webmaterial will remain available to readers in the future. If cited webreferences in journal articles, books etc. are not archived, future readers may encounter a "404 File Not Found" error when clicking on a cited URL. Try it! Archive a URL here. It's free and takes only 30 seconds.
A WebCite®-enhanced reference is a reference which contains - in addition to the original live URL (which can and probably will disappear in the future, or its content may change) - a link to an archived copy of the material, exactly as the citing author saw it when he accessed the cited material.
An on-demand archiving system for webreferences (cited webpages and websites, or other kinds of Internet-accessible digital objects), which can be used to ensure that cited webmaterial will remain available to readers in the future
Q. He, D. Kifer, J. Pei, P. Mitra, и C. Giles. Proceedings of the fourth ACM international conference on Web search and data mining, стр. 755--764. New York, NY, USA, ACM, (2011)