1. Download Zotero (if you haven't already)
2. Navigate Products>Zotero Plugin>Scroll till you see the link to the plugin or visit: Scite: Zotero Plugin
3. Under Assets click the link indicating scite zotero plugin (xpi file)
4. Once you have downloaded that file then open Zotero
5. Navigate Tools>Plugins and click the gear icon in the top right
6. Click Install Plugin from File and choose the download file from step 3