Setting Up Zotero - Step 2: Add the Web Browser Plugin
From the same page you used in Step 1 (zotero.org/download Links to an external site.), this time click the "Install Connector" button.
You should now see a button appear in the top right-hand side of your web browser. This button can change color and shape, but hovering over it with your cursor will always identify it as Zotero.
If you use multiple web browsers for your work, you'll need to repeat this step and a Zotero connector for each one.
Click 'Next' to continue to step 3.