If you're using Internet Explorer or a mobile browser, you can still save items to your Zotero library. A free Zotero Account is required.
The Zotero Bookmarklet works with all desktop browsers and most mobile browsers (including Safari for iPad and the Android browser).
Visit the Zotero Bookmarklet page for installation instructions for your particular browser or device.
Have PDFs saved to your computer? It's easy to add PDFs to your Zotero library and then import their citation info.