To install Zotero and the browser connection visit https://www.zotero.org/ and click the big red Download button. Please note that Zotero will determine the operating system and the browser used in your computer.
The following page will appear:
Installation of Zotero:
Installation of Browser Connection (add-on/extension):
The Zotero app is available to download for free on the App Store for iPhone and iPad users. Use the Zotero app to collect, organize, annotate, cite and share resources in your Zotero library.
*See the Zotero for iOS page for more information on how to use Zotero on your iPhone and iPad.