It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.
Download and install Zotero just as you would any other program. You will also need to install the Connectors, or browser plug-in, to allow your browser to save items to your Zotero library. See the steps below for instructions.
Step 1. Install Zotero
Download and install Zotero from the Zotero website.
(There's a different version for each operating system: Windows, Mac or Linux.)
Step 2. Install Connectors
Connectors allow your web browser to save citations to your Zotero library.
Open Chrome or Safari and click the Zotero Connector link for that browser to install it.
Each browser has its own version of the Zotero connector, so if you use more than one browser, you'll need to install the connector for each browser.