Hello. I run Firefox as my main laptop (Mac) browser. I have added Zotero to manage my writing reference citation library, and have downloaded the current Zotero Connector for Firefox. I should be able to add references from online, by using the Zotero save icon that should appear on my Firefox toolbar. But this icon is nowhere to be seen and I cannot see how to make it appear. The whole advantage of Zotero for me as a writing academic is pinned to this function, so I am anxious to get it working. How can I get the Zotero save icon in its proper place on my Firefox toolbar, just to the right of the search window? Many thanks