Mount Sinai security does not permit installation of browser extensions/add-ons like the Zotero Connector if they are only available through the browser add-on store. Zotero does not currently make the browser add-on available in a way that we can package it for secure installation.
Please review the Zotero Libguide to learn about other options for adding citations: https://libguides.mssm.edu/zotero
Adding citations manually
If you need to add something manually you can do so by clicking the green “New Item” (
) button at the top of the middle pane and selecting the desired item type from the drop-down menu. An empty item of the selected item type will now appear in the center column. You can then manually enter the item's bibliographic information via the right-hand pane.
Note: the Web Page item type is not included in the “New Item” menu, so you create an empty item of another type and switch the item type to Web Page in the right-hand pane.